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Firefox Customizations (Notes)


My notes on customizing the Firefox web browser, blocking ads, use of all of the fonts (webdings, wingdings, symbols), invoking Notepad, customizing the built-in searchbar, solving version related problems, copying and pasting formatted links.  A major portion of this document relates to my choices of Extensions. 

Additional pages cover Setup (initial installation), Toolbars & Context menus, Bookmarklets, Bookmarks, Keyboard shortcuts, Keyword shortcuts, and Tabbed browsing.  -- Special Topics:  Firefox 3 Introduction (presentation/introduction) for both beginners and advanced users, and preferred use Styles instead of using userChrome.css (same coding).

Short topics:  Google,  Default Browser,  Firefox Documentation,  Firefox Portable,  New Profile,  Places (Fx3),  Profile,  Quick Launch (Windows),  Use of Mouse,  Use of Tabs,  Search / Google,  New Profile,  Search Engine assistance in Generating,  -- AwesomeBar (new page)

Information found on this page includes:  An Introduction,  Firefox notes,  Customizations of Firefox and some specific extensions (Launchy, CopyURL Plus), Invoking Notepad, Problems with Firefox,  FAQ about Firefox 2.0 (Fx2 issues),  Extensions with short descriptions for my choices, accessing an additional home page by changing the throbber, newest section is Firefox 3 Beta concerns Found (see #fx3comments).

Organization of this page:  Generate the Table of Contents (Alt+O) for this page and other webpages by installing the Document Map extension, then from the View menu, click on sidebar and then Document Map.

Mysterious Disappearances:  This page keeps disappearing from the server.

These notes should save you time finding materials to run Firefox like you want it.  Most of the browser features and shortcuts are the same in any browser, so using or switching to Firefox should not be a problem and the Bookmarklets don't have the size limitations of Internet Explorer 6.   Most keyboard shortcuts added have to do with tabbed browsing, and shortcuts for changing font sizes are like welcoming back old friends (Netscape).

This page includes everything needed to install Firefox and describes most of the customizations I've made on my system including descriptions of over 130 extensions on this page which I've used and am currently using over ninety of them.  In other words there is not much point to a list of a mere 5 or 10 top extensions, many of which may eventually be incorporated in Firefox.  The beauty is that many people have written code to enhance Firefox, and you can pick and choose what is suitable for your own usage.   Customization you will not find here are: RSS feeds, Themes, music, audio, visual.  Nor will I get involved with those lists of why others might prefer Firefox.

Location:  http://www.mvps.org/dmcritchie/firefox/firefox.htm
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[ TABLE OF CONTENTS ]

Where to get Firefox and Updates   (#wheretogetfirefox)

Firefox: The latest version is Firefox 3.0 updates to Firefox itself appear to be coming out about the middle of each month.  Use Firefox - Rediscover the web to download the latest Firefox  Updates to Firefox and to Extensions can be checked automatically if you want through Tools, Addons, Find Updates; likewise, if you don't like hidden things running you can turn them off and check things when you want to.  (Release notes  for 3.0.8 are available), in addition you might want to check out Field Guide to Firefox 3 (dria.org blog).  [png] and expecially Features.

Where to Get (download) Firefox:  http://www.mozilla.com/firefox/ or with latest news: http://www.mozilla.org

Updates:  Updates can be automatic or manually checked.  (Tools, options, Advanced, Software Update: Check Now).

Old versions:  The problem often turns out to be something else, but if you want to restore an older version, you will probably find it in your downloads; otherwise, start at ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/ then choose version, platform (win32), language (en-US).

Bleeding Edge and Release Candidates not for general consumption:

Firefox Information/Features/FAQ at Mozilla and Mozillazine   (#info)

Mozilla:  [Features] [FAQ] [Tools, Options] [keyboard shortcuts (no longer decent)] [menu]; 
Mozillazine KB:  [Firefox] links to problem solving (issues); and, installation and customizations (FAQ)

In order to learn how to use Firefox efficiently you should become familiar with using HELP (F1), shortcuts, and menu items as a starting point.

The main difference most people will experience is the addition of Tabs in addition to separate Windows, much of which can be seen in the Keyboard Shortcuts.

Firefox after Internet Explorer   (#intro)

Firefox web browser, my notes on setting up and customizing Firefox with selected extensions after having used Internet Explorer.

Have been using Internet Explorer for several years, and wanted to have more flexibility using Mozilla Firefox which offers more robust bookmarklets (IE limits size), better Ad Blocking (project) to block banner ads, and block popups.  The initial frustration with Firefox was not being able to easily get into an editor like Notepad (see Launchy extension, below), and in not being able to copy the link and title to paste into source as an href anchor (see copyurl, below). 

Something probably unique to my site is the page on use of Right Click menus in Firefox, which are properly called Context Menus because the menu changes depending on where you right-click.

Titlebar
FF Titlebar

Menus, Search Bar and Firefox Throbber   (#searchbar_menus)
FF Menubar

Search Menu
Search Menu

Searchbar:  The Searchbar (defaults to Google search engine) that comes with Firefox is too SMALL and Narrow.  (BTW, move the Search Toolbar to end of Firefox menus).  Solution: see Change the width of the searchbar (400 pixels and is self adjusting) in userChrome.css but first read about creating keyword shortcuts for your profile and chrome directories to help you locate the chrome directory for modifications.  Why anyone would want to install an extension to do the same thing is beyond me -- incidentally the search bar will expand automatically in Firefox 2.0, leaving one to wonder what would happen if it is on the same row as the location bar which also expands, since there is no relative percentage maximums.

The search bar that comes with Firefox has a drop down that can easily be customized to add additional or delete (uninstall) search engines (Mycroft).  Do not bother with the Googlebar extension, it is not needed, and the Mycroft customized search engine additions provide far more flexibility.   For a picture of my actual search drop down click here, or see a different example.  For the Advanced Search for Mycroft Search Engines, Mycroft Project: Sherlock & OpenSearch Search Engine Plugins

Menus & Tabbed Browsing:  Ctrl+T, bottom of folder in directories/links has “Open in Tabs” -->

The Throbber can be changed to address additional home pages with up to four pages with the "Throbber Button" extension.

Location Bar 

FF Location Bar

Use icons without text on most toolbars.   New Tab button comes with Firefox, but is enhanced with Drag and Drop extension which has been built-in since Firefox 1.5.   You could use Ctrl+click on a link instead of drag and drop.  The Launchy extension provides the ability to invoke Notepad, installed browsers such as IE or Opera, the Windows Explorer, or a choice among text or HTML editors.

At the right end I have Open a New Tab to facilitate use of Drag to Tab, and the Launchy icon as a time saver alternative to having to use a secondary menu within the context menu.

Suggest you continue reading below for problems, adaptations and customized implementations now; and, use the links at the top of this page later for more detailed usage of Menus, Toolbars & Context menus.

Plug-ins   (#plugins)

Plug-ins:  (Firefox list of popular plugins – For a more complete list see bottom of that page, and check specifically for your system ).  Be careful where you obtain plug-ins from -- the pages listed on that page would be the right places to use. 
  -- PluginDoc: Windows (Most Popular))
  -- PluginDoc: Windows (A - Z), Mozilla Plugin Support on Microsoft Windows
Adobe Reader:  PDF files should be directly opened with the Acrobat Reader (.pdf file type), never allow browsers to open them.
Java Plug-in -- Most users should be at Java 6 for more information see automatic update warning to check out your Java plug-in (Important !!!)

Diagnosing plug-in problems

To find what plug-ins are installed type about:plugins into the location bar.  Read topics within http://kb.mozillazine.org/Category:Plugins

The Infolister give you a nice listing of installed extensions, plug-ins, and themes.  You can compare your list to mine to make sure your versions are at least as high as mine, see my /example/ though most don't actually show the version there.

This is what I have for my actual listing for about:plugins you can check the date I created file by looking at the directory that the Plug-ins.htm is in (using Windows 2000).

Change plug-ins location:  gemal.dk - Mozilla - Plug-ins with Mozilla, also see Move plugins to another location - Firefox - MozillaZine Knowledge Base which may describe other locations that would be found.

Themes   (#themes)

As mentioned at the beginning, I'm not into themes, but you can see what themes you have with Tools, Themes and you can obtain theme addons at Themes: Firefox add-ons or you can build your own search engine for themes see

Firefox Notes  (#firefox) Mozilla

IE View (Firefox extension, right-click) will bring up Internet Explorer window of same name.  ♦ (#ieview_topic)
As popular as IEView is, Launchy does so much more and if you install Launchy then IEView becomes redundant.
 
Firefox View (available where Firefox extensions are available, right-click) will bring up Firefox window ♦ (#firefoxview_topic)
of same name from Internet Explorer. 
 

Install CopyURL_plus text editor extension (#copyurl_notes)

Creation of <a href=""></a>   ♦  (install CopyURL plus text editor extension, right-click)  (#copyurl)
URL+ submenu (context menu),
based on additions to user created user.js file within the profile folder,
More information in copyurlplus.htm
Example output of built-in Plain Text choices
Specific short example
 (-) Copy URL + Title
 (-) Copy URL + Selection
 (-) Copy URL + Title + Selection
 (1) Copy URL + <dt>title<dd>selection / url
 (2) Copy URL + <a href=...>...</a>
 (3) Copy URL + <a href=...title=selection>...</a>
 (4) Copy URL + <a href=...>...</a>, selection
 (5) Convert TEXT to HTML code
 (6) DIV Offset + <a href=...>...</a>, selection
The CopyURL+ extension for copying and pasting the link title, and url from the line anchor information, along with the current selection, is easily customized to format this information using patterns of your choice to paste into other applications.  Some suggested customization patterns are included for blogging, HTML, plain text for email, and other uses have been provided.

There are 3 built-in menu items that you may or may not see depending on what is selected,
and whether you RightClick on a link or not.  Forward slashes in display represent new line. 

B1:  Title/url -- available, even if url has no Title
B2:  Selection/url -- available if there is a selection
B3:  Title/selection/url -- available if there is a selection

CopyURL+ Additions to user  (#copyurlplus_additions)

The following items are included within user.js in my Firefox profile directory for my customization of CopyURL Plus.
 
user_pref("copyurlplus.menus.1.copy"," <dt><b>%TITLE_HTMLIFIED%</b>,</dt>\n<dd>%SEL_HTMLIFIED%\n<br><a href=\"%URL_HTMLIFIED%\">%URL_HTMLIFIED%</a> </dd>\n");
user_pref("copyurlplus.menus.1.label", "Copy URL + <dt>title<dd>selection / url");
user_pref("copyurlplus.menus.2.copy", "<a href=\"%URL_HTMLIFIED%\">%TITLE_HTMLIFIED%</a>");
user_pref("copyurlplus.menus.2.label", "Copy URL + <a href=...>...</a>");
user_pref("copyurlplus.menus.3.copy", "<a href=\"%URL%\">title=\"%SEL_HTMLIFIED%\" >%TITLE_HTMLIFIED%</a>");
user_pref("copyurlplus.menus.3.label", "Copy URL + <a href=... title=selection>...</a>");
user_pref("copyurlplus.menus.4.copy", "<a href=\"%URL_HTMLIFIED%\">%TITLE_HTMLIFIED%</a>,>%SEL_HTMLIFIED%");
user_pref("copyurlplus.menus.4.label", "Copy URL + <a href=...>...</a>, selection");
user_pref("copyurlplus.menus.5.copy", "%SEL_HTMLIFIED%\n\n");
user_pref("copyurlplus.menus.5.label", "Convert TEXT to HTML code");
user_pref("copyurlplus.menus.6.copy", "<div class=\"offset\"><a href=\"%URL_HTMLIFIED%\">%TITLE_HTMLIFIED%</a>, %SEL_HTMLIFIED%</div class=\"offset\">\n\n");
user_pref("copyurlplus.menus.6.label", "DIV URL + <a href=...>...</a>,selection");

The additions: 1) is a dictionary list entry, 2) is the basic HTML link, 3) HTML link selection internal, 4) HTML link selection external as comment, 5) will create HTML code from text, 6) will create an offset listing if you install the required style.  There is no check when presenting the additions that you have a selection or that the cursor is on a link.

If you end up with doubled set of options, see doubled problems on my page which provides more extensive notes on COPYURL Plus, create a link for HTML

Launchy Notes ♦, opening Notepad and other applications (#launchy_notes)

   
Launchy will launch a program, or editor from a webpage or a link.  The Notepad editor is included in Launchy context submenus, providing sought after ability to edit with Notepad when using Firefox.  I wanted to also include HTML-Kit and Edit Pad Lite.  Since it is more difficult to click on a submenu item, suggest installing the Launchy toolbar as well.

Launchy (Context menu)
ff_launchy.jpg

Launchy Links context menu
ff_launchy_link.jpg

The following code goes into the launchy.xml file that you create in your chrome directory (see customizations), per instructions in http://gemal.dk/mozilla/launchy.html     Launchy will look for a file called launchy.xml in the chrome directory in your profile

(If you are bothered by words running through tables, especially on low resolution monitors, see write-up with Toggle Word Wrap). 
<?xml version="1.0" encoding="UTF-8"?>
<configurations xmlns="http://launchy.mozdev.org/configurations">
  <application>
    <label>Edit Pad Lite</label>
    <type>7</type>
    <command>C:\program files\JGsoft\EditPadLite\editpad.exe
    </command>
    <arguments>-editor</arguments>
  </application>
  <application>
    <label>MS Front Page</label>
    <type>7</type>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
    <command>%ProgramFiles%\Microsoft Office
      XP\Office10\frontpg.exe</command>
    <arguments></arguments>
  </application>
  <application>
    <label>Windows Explorer *1</label>
    <type>1</type>
    <command>c:\winnt\explorer.exe</command>
    <arguments></arguments>
  </application>
  <application>
    <label>HTML-Kit</label>
    <type>7</type>
    <command>%ProgramFiles%\Chami\HTML-Kit\Bin\HTMLKit.exe</command>
    <arguments></arguments>
  </application>
</configurations>
For a sample launchy.xml to be able to bring up more browsers, and to be able to bring up other Firefox profiles with other versions of Firefox, see example launchy.xml.

Before adding anything to launchy.xml use Tools/extensions select Launchy and check the options list.  Even though Windows Explorer should work as File Explorers (type 6) from options, I had to add it to browsers (type 1) for it to work for me to look at directories and to verify an extension is opening in it's default (opened bug 8874).  Although not shown I did find value in also adding NOTEPAD to extensions (type 1) so that you can get to notepad from a link, not recommended for others because a fragment-id would mess up direct usage.

With the above XML for Launchy in place, I get the additional context menus in Firefox that I wanted and basically the results I want and need to use the Windows Explorer, not to be confused with Internet Explorer. 

  1. A link of the form http://bugzilla.mozdev.org/show_bug.cgi?id=8874 will fail in Launchy with “The path '8874' does not exist or is not a directory” -- an error message, but quite tolerable and understandable as there is no file extension.  [right click on the above link, choose Launchy then choose Open link in Windows Explorer *1]
  2. A link of the form http://gemal.dk/mozilla/launchy.html will open just fine in the default browser and is needed and lets me know if my default browser is properly defined and working.  [right click on the above link, choose Launchy then choose Open Link in Windows Explorer *1]
  3. Open a link to a local directory such as file:///c:/temp/ in Firefox, then right-click on white space (non link) then from Launchy bring up Windows Explorer.  [left-click to open link, then right click within the browser's directory view to bring up Launchy then Open in Windows Explorer *1]
    The additional entry for Windows Explorer is needed to open said directory with Windows Explorer from within HTML.
  4. Don't open the link from the browser but use the Launchy context menu to open the link to a local directory such as file:///c:/temp/ [right click on the above link and choose Open link in Windows Explorer *1 or from the Launchy default Browse link in Explorer.
    In the case of Open Link there actually is no need for the additional XLM definition, though I personally like it as a choice with the browsers even if duplicated.
  5. A link to a .jpg file such as ../icons/ff_launchy_irfanview.jpg opens according to it's file type and lets me know that it is properly defined and working, and more to the point lets me bring it up in it's intended application without additional definitions for Launchy.  [right click on the above link, choose Launchy then choose View Image in IrfanView]
  6. Place cursor anywhere but a picture or a link on this page, using Launchy this page should reopen this page in the default browser.  [right click on the above link and choose Open in Windows Explorer *1]

Don't worry too much about the type, you will see how they group from the above examples.  Within their group the items are alphabetical.

To help create a Launchy entry use file search to find the directory, if you have a problem it could be you have more than one, or you can't simply use something like frontpg.exe as you could from the Run program dialog.

If you have installed IrfanView (and have .jpg defaulting to IrfanView) you can read the Exif Data information recorded by digital cameras or photo retouching by right-clicking on the picture, choose Launchy, then IrfanView, use shortcut character “I” to see picture information.  [notes on IrfanView]

Webdings and wingdings Fonts can be made available in Firefox.  (#wingdings)

|| that’s all  (´(&#180;), ’(&rsquo;), and as arial -- that’s all  (´(&#180;), ’(&rsquo;) ) ||     ¥ z Q P#001

Any changes that you make to the fonts, apply only to your own system, the main purpose here is so that you can see pages the same in Firefox as seen in Internet Explorer.  I did include a barcode font described on my Mail Merge page (Excel & MS Word) just to show that any fonts you added to your Windows system can also be made available in Firefox.

Writing your own HTML then you should be using HTML escapes or Unicode characters, though you may not find a substitute for everything even in Unicode.  For more information on symbols used in HTML see my Symbols page.

I just wanted to be able to include some symbols regardless of the browser.  On my search page are some symbols at the top which are fine in Internet Explorer but no good in Firefox.  I have included some JavaScript on the search page to spell out some of the material that would otherwise be completely ambiguous.  Can't use UDF-8 either for the webpage because that would mess up Internet Explorer.  An attempt to use images proved unwieldy.  Found the solution though in adding the fonts to Firefox as follows: 

This customization, if wanted, usually has to be redone after each upgrade to Firefox.  [Windows fonts]

The following workaround is only for pre Firefox 3 as fontEncoding.properties file is not found/used in Firefox 3 and I can't find any solution for Firefox 3. 
  Bug 424610 - Wingdings-font characters display incorrectly; fontEncoding.properties hack is gone
  Bug 411604 - rich messages (HTML) do not render wingdings font (a symbol font) e.g. displays "J" instead of ☺ smiley
  Bug 90643   - Does not render symbol font as commanded by CSS
 
If documents are under your control you can recode wingdings, but not all browsers will pick up unicode and sizes and alignment vary, see Wingdings character set and equivalent Unicode characters, even on Vista there are still at least 85 wingding characters that have no Unicode equivalent.

To Make Webdings and Wingdings available ♦  make the following changes: 
#-- Free 3 of 9 barcode available from Matthew Welch http://www.squaregear.net/fonts/
#-- fixing by hand -- Enabling Symbol font for Mozilla on Windows
#-- http://hutchinson.belmont.ma.us/tth/Wfonts.html
#-- file:///c:/program files/Mozilla Firefox/res/fonts/fontEncoding.properties
# Symbol font
#encoding.symbol.ttf = Adobe-Symbol-Encoding
encoding.free3of9.ttf = windows-1252
encoding.symbol.ttf = windows-1252
encoding.wingdings.ttf = windows-1252
encoding.wingdings2.ttf = windows-1252
encoding.wingdings3.ttf = windows-1252
encoding.webdings.ttf = windows-1252

#For the changes above, use an editor (HTML-Kit) that will not make it CRLF, must be LF -- Do Not Use NOTEPAD. 
#-- for Mozilla file is file:///c:/program files/Mozilla/res/fonts/fontEncoding.properties
#-- for Firefox portable file is #-- file:///F:/FirefoxPortable/App/firefox/res/fonts/fontEncoding.properties

Once completed you should be able to see:  symbol(D delta),  webdings(‡ skier‡),  wingdings(( black phone, ♦ star, ¥ target, z point of interest, Q airplane),  wingdings 2(' white phone, R check mark in a box, ù 3 stars),  and wingdings 3(_ arrow) in Mozilla just like you; would see in Internet Explorer.  If those are correct you should be able to see this Font Table on your PC system exactly as it appears in IE on your PC system. 

‡  In the example above the double dagger(‡) symbol &#8225; or &Dagger; has been substituted for Windows &#135; and still shows a skier in a successfully implemented webdings font.

Windows characters 130-159 (x'80'-x'8F') are considered invalid by W3C standards, though widely recognized and in use from the 1980's and now registered as the windows-1252 code page (Win-Latin1) at IANA [ref, ref.] and are described in The ISO 8859 Alphabet Soup document.

Short test for superscript/subscript, okay in firefox where x<sup>n<sub>i</sub></sup> renders correctly as xni, but IE6 displays as xni as if it was x<sup>n</sup><sub>i</sub>   [Ref]

Notepad  (#notepad)

Not having an automatic tie in to Notepad for View Source, can be alleviated by any of the following:
  • Configuration Changes to tie into Notepad with Ctrl+U
      view_source.editor.external set to True
      view_source.editor.path set to c:\winnt\notepad.exe   [use \windows\ in Vista instead of \winnt\]
    The above is now a documented Tip in Firefox Help: Tips & Tricks, “View page source using an external program”.
    Note the above change will change your Edit,View (Ctrl+U) to Notepad as an editor, so you lose the nondestructive browser viewer.
      You can still view source in the DOM with a keyword shortcut ("view-source:"):    javascript:location = 'view-source:'+location
    There is also a problem with view_source.editor.path in that "View Selection Source" on the Context Menu often fails.

    Getting "unresponsive script errors" on context "view source" have increased dom.max_script_run_time in about:config from 10 to 15, but don't expect that to change anything.  try extracting the notepad symbol at end of this page with view source selection.  DOM is busted Fx2 also happens in safe-mode see ...

  • Launchy, provides for notepad see notes (above) and in extension table (below).  If not on your local drive Notepad brings up a temporary copy, which is easily identified at the title bar.
     
  • MenuX.  provides Alt+X as a shortcut.  MenuX has/causes too many problems so suggest not using MenuX.
  • Web Developer, provides default shortcut of Ctrl+Shift+` (accent grave) but you must specify the location of notepad (i.e. c:/winnt/notepad.exe or in Vista use c:/windows/notepad.exe),  You can change the shortcut Ctrl+Shift+` to the easier to use Alt+X with the keyconfig extension.  If not on your local drive Notepad brings up a temporary copy, which is easily identified at the title bar.  I prefer the configuration change though, since I've found out about it (see first item using Ctrl+U).
  • JSView Add-on, allows you to open the source code of any web page in a new tab or in an external editor.  If the website you are viewing contains any external js/css files, an icon will appear that says "CSS", "JS", or both.  Each individual file can then be viewed by clicking on the filename from various menus.  (Haven't tried this ext because not really working with JavaScript, or CSS).
If you change your default editor, you can still view the source of a webpage from the location bar as follows:  [ref(1), ref(2)]
  view-source:http://www.google.com/

Default Browser  (#defaultbrowser)

default browser — it doesn't really matter.
Though Firefox is now my default browser, I had continued with IE as the default just in case it made a difference, as it does on the Microsoft update sites.  Was perfectly happy that Firefox was invoked from links in Outlook Express which was all that really mattered to me – perhaps because Firefox was installed later.– You've normally decided which browser you want to use by selecting that icon from your Quick Launch or from the desktop, but Launchy provides the means to bring up any additional installed browser looking at the same page you have up from within Firefox.

folder options, files types... and Windows Explorer, because I have added Explorer to the list of browsers within the launchy.xml , it is easy to remove the filename portion of a URL at the location bar to get to the directory listing (on your local drive, and some websites) then to use Launchy to invoke Explorer which since it is a directory brings up Explorer listing.  Columns in the directory not normally seen in a default Windows directory have been included via View, Choose Columns.  The Comments column is used by Excel.  You might choose different or additional columns for other directories.  Directions to make Firefox your default browser.
 Name  Size  Type  Modified Created  Accessed Attrib.  Comm.
firefox.htm 194 KB HTM File 2006-05-24 09:53 PM2004-08-09 10:45 AM 2006-05-26 12:00 AMA
rightff.htm 69 KB HTM File 2006-05-26 06:45 AM2004-08-11 11:03 PM 2006-05-26 12:00 AMA
index.htm 3 KB HTM File 2004-11-02 98:56 AM2004-08-16 11:42 AM 2006-05-26 12:00 AMA

    Related Material: What's New with Firefox (mozilla.org news)

 

Firefox Problems:
      Things that don't always work, or never worked (#problems)

  • Case sensitivity of fragment id:  Unix servers are case sensitive, so all files and directories, have been created as lowercase.  But Mozilla Firefox has extended this problem to the HTML id= tags as well, so that they are also case sensitive.  (called fragment id and by definition is not part of the URL)
    Response: See standard and see discussion;  I'm going to keep it here anyway because it seems arbitrary, and “not defined” and “(incorrectly)” seem contradictory when on this side of the fence. 
    Reason for keeping this here as a problem:  HTML must be changed and others who write mainly for Internet Explorer should be aware of this problem.  Users who rely on fragment id should be aware of possible failures.
    Help with locating fragment id problems:  Check web page with W3C Link Checker similar to using The W3C Markup Validation Service
    Help with viewing fragment id:  Bookmarklets:  Show Classes and ID, id visible;  Extensions:  Aardvark, Colorzilla
    #top, requires an actual id= or a name= anchor in Firefox and Opera.
     
  • Adjacent hyphens within comment:  This error is flagged in HTML-Kit and failure to correct will result in missing areas of content in Firefox.   The following is an example, solution change the inner hyphens to equal signs.  Easy to find and fix, result is easier to see, but is something to watch out for.  (#hyphens)
      <-- ------------------ snip out for other model --------- -->
      This code will be ignored in Firefox.  (to locate and fix search for triple hyphen)
      <-- -------- end of -- snip out for other model --------- -->
     
  • Adobe pdf files load slowly in Windows? (#pdf) ♦, Adobe Reader 6.0 for Windows loads lots of unused plugins on startup (bloated).  You would do much better eliminating these plugins and opening PDF files externally with the Adobe Acrobat Reader from your browser rather than within your browser.  You do not want these plug-ins using valuable system resources.  Trying to use the plug-ins within a browser greatly diminishes your ability to properly use the Acrobat Reader and you lose screen space to both browser and Acrobat Reader toolbars and menus. 
    Set the options in Firefox, do not install the PDF Download Extension as it is not needed.  See complete instructions on my PDF page
     
  • Can not paste table from Firefox to Excel: (#excel)
    To paste into Excel you will have to switch to Internet Explorer, you can use IEView extension or to keep down the number of extensions you have/use you can use Launchy to open same page in IE, then copy and paste.  (Table Examples).  Excel 12 will use XML).  See TableTools extension to copy from Firefox directly to Excel.
     
  • MacroMedia Flash  (#flash), some run and some don't, solution is to uncheck "obj-tabs" option in Adblock.  [ref 2005-10-18] **.  Upgrading to Firefox 1.5.0.1 seemed to work for some, but then got sound only even after moving window and scrollbars, so if using ADBLOCK suggest you uncheck the option.  IE users may have the same problem with flash files and I've not run across a solution.
     
  • Minor annoyances:  (#minor)  The above are problems for most everyone, this one is an annoyance for anyone that has their own web pages on their own harddrive.  IE would look at directory as you type in a page on your local drive, but Firefox will only suggest pages as you type that have been read meaning they have to be in your history file; however, since it is the local drive you can look at the directory.  Workaround:  the directory is listed within Firefox, so you can view the directory and select the file.  You can invoke Launchy to invoke Windows Explorer from the directory or file.  You can use Launchy to invoke Notepad from within the file.
     
  • Closing Firefox’s Superfluous Windows, may be of interest for those who open Firefox from the desktop.  (I open from the launchpad).  Seem to have problem with Firefox 1.0PR but can't follow the direction file-type change in Explorer for: Select Extension: (NONE), File Type: HyperText Transfer Protocol
     
  • Slow typing in Firefox on a duo core machine running Firefox 3.0.6.  Try changing browser.cache.memory.enable to False. Problem of maxing out one core of a processor is fixed in Fx3.1 [ref, hmmm]
     
  • Problems with FIND continues to be a problem ever since Firefox 1.5.0.1 it is still a serious problem even in 2.0 (possibly fixed in 2.0.0.2).  More detail in Firefox find not working, though you can probably find what you need in the following workarounds.
     
    workarounds for FIND problem are just that, they are completely unsatisfactory. (most have to do with caret browsing)
    1. Highlight all, you really won't know if you see them all, and the main purpose of Find is to act like Find.
    2. Duplicate Tab extension to create a new window will work-around the problem by allowing you to open a new window, populating it with the content of the current Tab using Ctrl+Shift+N
    3. Use Launchy to bring up Internet Explorer or other alternate browser (IEView is another way to bring up IE).

    Bug 311376 – Occasionally ' or / keys start find bar even in textareas [slash, apostrophe, quote, FAYT].  Bypass: Uncheck the Search for text when I start typing (opposite of what was written above, [Nir 2007-06-21, also see Bug 311376#c40].

    Turn off Caret Browsing (see next item) as it affects Find.
     

  • Caret Browsing (#caret) - Problems PageUp, PageDn, Home, End, SpaceBar

    Problems in using  Page Up, Page Down, Space Bar, Home, and End keys continues to be a problem ever since Firefox 1.5.0.1 it is still a serious problem even in Firefox 3.5 

    Turning off caret browsing (caret navigation) is tricky, since F7 can change it.  These are some of my about:config settings, the important one is that accessibility.browsewithcaret be set to false.  Needless to say this is also a workaround, and not a fix for the Firefox caret navigation problem
    accessibility.browsewithcaret default boolean false
    accessibility.warn_on_browsewithcaret default booleantrue
    accessibility.typeaheadfind default boolean false

    F7 is a toggle for caret browsing, when it comes with the dialog you must reply with NO concerning turning caret browsing on.
    The fix for this problem is to eliminate the MenuX extension.  Will be checking if problem recurs at all.
    keyconfig extension is now preventing PageUp, PageDn, SpaceBar from working like Caret Browsing had before with F7.

    Tools, Options, Advanced, General, Accessibility:
      [_] Always use the cursor keys to navigate within pages (formerly:  Allow text to be selected with the keyboard)  [uncheck same as false for caret]
      [x] Search for text when I start typing (formerly:  Begin Finding when you begin typing)  nice feature, hopefully not involved with problems
    With caret browsing off, the blinking cursor {|} is off.

    You can go for hours or weeks without further problems, but will still have problems later on even though you are careful to keep caret browsing off, so keep in mind the other workaround about opening a new window (Ctrl+N) or if you installed Duplicate Tab (Ctrl+Shift+N) would be better.  In any case, if you are one of those that has a problem, you will never be able to work when caret browsing is on.  Another problem (feature) of caret browsing is that it changes getting to end of a page from End key to Ctrl+End key.
      The following additions to user.js should alleviate problem caused by inadvertently hitting F7 which changes the setting.  This will reset when Firefox is restarted. 

    // Get SpaceBar, PageUp, PageDown to work properly if F7 hit accidentally
//   see http://www.mvps.org/dmcritchie/firefox/firefox.htm#caret(problems)
 user_pref("accessibility.browsewithcaret", false);
 user_pref("accessibility.warn_on_browsewithcaret", true);
  • Problems with vertical scrolling using Spacebar, and Page Up and Page Down continue through 1.5.0.7, though directly related to Find Problem (above) you can sometimes get these working on a page by moving the vertical scrollbar with the mouse, and you know for sure when it is not working.  (as opposed to Find problem)  Again major cause of problem is MenuX and especially if caret browsing is involved.
      Another problem, after a bad change to a .js file in the keyconfig extension then none of the vertical scrolling worked except the scrollbar itself. Backed off the change and this is working again (2008-03-22).
     
  • Firefox will not always terminate  (#terminate) and when it won't terminate you can't start another instance of Firefox until you kill the running one seen only in the Task Manager.  Seems the bypass is to use File, Exit instead of the [X} close button, even though both may show the close multiple tabs warning.  If you are experiencing such problems though you should check out Firefox hangs article.

    If you just want to Restart Firefox, like you do just after installing an addon, it would be a lot easier for you if you installed the “Quick Restart” extension and used Ctrl+Alt+R keyboard shortcut.
     

  • Updates, update indicates later extension available for Linky but already had that update installed.  There were two Linky's in the Extensions list, uninstalled both of them and reinstalled (fixed).
Unrelated problem:  HTML-Kit scroll wheel direction is reversed in the Edit window, and only in the edit window, to all other usage in Windows.  Scroll wheel direction works fine in HELP (browser).
 
Some problem items have solutions and have been moved to Firefox Notes in the frame above.

Problems in starting Firefox – problems cont'd (#willnotstartup)

If Firefox will not start, first check to see if FIREFOX.EXE is already running by checking your running tasks — ctrl+alt+del, Task Manager, Processes.  If it is already running then terminate that task and try again, this usually gets you back.

Had a rather serious problem in that Firefox would come up in the running tasks (Ctrl+Alt+Del) but not in the running Application (tab) and terminating and restarting did not work.   Had to backup my profile (2005-03-19), uninstall Firefox from the file folder (not found in uninstall programs), and delete all it's files and then a complete reinstall of Firefox 1.0.1 (and 1.0.2 was coming out the next week is now available).  Probably somewhat of a symptom the firefox that would not start had a zero size XUL.mfl
  http://techpatterns.com/forums/about372.htm (which is not a Firefox forum), and in
 http://kb.mozillazine.org/Browser_will_not_start_up#How_to_Make_Firefox_Start
Though safe mode did not help, I did have to delete and recreate a profile, after reinstalling Firefox.  Safe mode allows you to disable or uninstall extensions without invoking any extensions -- for Windows the command would be:
  "C:\program files\Mozilla Firefox\firefox.exe" -safe-mode
  firefox.exe -profilemanager

Some other things you can do with Start Run or System shortcuts:

  firefox.exe -new-window about:blank
  firefox.exe -new-window <url>
    see http://kb.mozillazine.org/Command_line_arguments
#List_of_command_line_arguments_.28incomplete.29
Some Quick Launch suggestions for Windows users

   

Restoring some specific profile files, after reinstalling Firefox after complete removal.
Files I restored from my thumbdrive backup so far were: bookmarks.html, cookies.txt, chrome/userChrome.css, chrome/userContent.css, and chrome/launchy.xml which put me in good shape for my options, and menus, then simply reinstalled the extensions that I really needed.  Was a lot more conservative about what I really need as you can see to the right (I had a slow memory impaired computer, much better after upgrading from 128MB RAM to 512MB RAM since then).  With limited RAM the important ones are:  Adblock, Context Highlight, Copy URL+, Drag to Tab (built-in), Launchy, InfoLister (better than Listzilla), Sort Bookmarks, and Web Developer.

The good news is that I don't seem to have the extra Mozilla Firefox window without customizations opening along with the Firefox window when I open Firefox.

Related Material:  Gripes about Firefox web browser (computergripes.com)

Alternate browsers
There is no excuse for being shut out from the internet when your favorite browser fails at a critical moment, you should always have a couple of other browsers installed and available to fall back on to check connectivity and to search for a resolution of problems. 

image url: http://www.google.com/imageslogo_sm.gif
link url: http://www.google.com/webhp?hl=en
width: 150px
height: 55px
Don't know where this came from, but when I hover over an image this shows up, and it is annoying, covers up text, and even worse often gets stuck and won't go away.  Seems to match description of various “floating image toolbar” extensions -- but I have no such extension installed that I know of.  In fact the comments on one such extensions say it is annoying.  Incidentally properties on the context menu provides additional information: size on disk (if not local), and alternate text – to this annoyance is absolutely worthless.  Finally resolved:  turn off option in MenuX -- Display tips for tools/images -- now back to displaying titles only in a small strip for images (not alt).

[small FF Window] Another annoyance is when a Firefox window opens too small, not only is it hard to find, but it is hard to resize with the cursor unless you remember to use Alt+SpaceBar first to move or resize a window.

Fx2 FAQ - Frequently Asked Questions (FAQ)   (#fx2) -- [also see Fx3 and particularly Fx3 comments and issues ]

    Problems/Solutions/Changes

Initial comments concerning what I was going to do in Firefox 2.

Fx2 - about:config preferences   (#fx2config)

How To Modify Hidden Preferences Using about:config, only if you don't know how.
browser.tabs.closeButtons   3 (Display a single close button at the end of the tab strip -- Firefox 1.x behavior)
browser.tabs.tabMinWidth 10 (still only 24 tabs FULL width, to do better make changes to userChrome.css)
extensions.checkCompatibility False (read the article, can be risky), use False to continue to use old extensions
browser.urlbar.hideGoButton True (to remove "Go" button from Location bar)

Fx2 - Sudden Connection Refused Messages (#firewall)

Common problem after a Firefox automatic update is a failure in being able to connect to the internet, caused by Firewall rejecting connection.

Fx2 - menus   (#fx2menus)

Fx2 - Private Data   (#fx2data)

Fx2 - Toolbars   (#fx2toolbars)

Fx2 - Bookmarks Bar   (#bookmarksbar)

Fx2 - Bookmarks   (#fx2bookmarks)

Fx2 - Files   (#fx2files)

Fx2 - Find and scrolling problems (#fx2find)

Fx2 - Home Page differs   (#fx2home)   more info ►

Fx2 - localstore.rdf   (#localstore)

   Appears to be the most common problem in moving up to Fx2, but also common after updating Firefox or extensions.

Fx2 - Tabs Bar   (#fx2tabsbar)

Fx2 - Extensions   (#fx2ext)

Problem that was missed by 2.0.0.8 and will be fixed in next update:

Bug 396695 - Add-ons are disabled after updating. Users can fix this problem by opening their profile folder and removing three files (extensions.rdf, extensions.ini and extensions.cache) Actual bug title was "Add-ons go into 'needs to restart' loop commonly after a firefox update" [ref: regression-bugs-in-Firefox-2008]

http://kb.mozillazine.org/Unable_to_install_ themes_or_extensions_-_Firefox#Corrupt_extension_files

Fx2 - Status Bar (#fx2statusbar)

Fx2 - Display (#fx2display)

Fx2 - Fonts   (#fx2fonts)

Fx2 - Images   (#fx2images)

Fx2 Videos won't play (#fx2videos)

Fx2 Problem sites  (#fx2sites)

    Link Checks, check how items are opened for some of the sites listed here.

    See additional comments just below the following list.

Additional comments concerning use of popups, cookies, passwords all sites:

Many sites require JavaScript and under Advanced the only item I allow is for scripts to raise or lower windows. 

pop-ups while I do have exceptions (tools, options, contents;  exceptions) for when pop-ups are turned off, I generally do not suppress pop-ups, but do rely on other means of controlling unwanted urls including the Adblock extension, and hosts file. 

Put another way, any site that serves third party ads in images or pop-ups is unlikely to have your interests at heart and makes a mockery of any privacy policy statement they show on their site.  Unfortunately there are far too many such sites to block third party images. 

If you have "Redirect Remover" (RDR) extension you will have to make some exceptions, and it is easily enabled/disabled at the status bar.  The "Adblock" and "GreaseMonkey" extensions are easily enabled/disabled at the status bar without affecting your entire session by going through tools, addons.

Concerning sites requiring passwords to view material, avoid them if you can.  Less than 1% of the sites cause a lot of problems.  Unless they hold your money or confidential material, there really isn't much need for most of them, nor for you to use such sites.  Be sure to use unique passwords.  See private data.

Long time to download (#slow)
Pipelining may slow down some sites such that they never appear to download or take a long time to download.  A common site that is mentioned is filehippo.com, which was slower but did load; whereas, acdsee.com simply took forever, and was not improved with pipelining off (nefarious site, after it loads, it redownloads, privacy policy also is slow).

Content in Firefox window bounces (#bounces)

Window shakes (Mozillazine KB), Content within Firefox window bounces, jitters, dances, dancing\ due to lack of bookmarks, bookmarks toolbar, or bad theme. (2006-12-26)

Calling Out (#callout)

Connections established on startup - Firefox - MozillaZine Knowledge Base, SSL, Live Bookmarks, updates, home page, phishing sites, prefetch links

Script Busy   (#scriptbusy)

Something to test after adding/enabling an Extension: Ctrl+A (select all) followed by right-click to bring up context menu.  Big problem if instead of context menu you get "A script on this page may be busy, or it may have stopped responding.  You can stop the script now, or you can continue to see if the script will complete [Stop Script] [Continue]".  These extensions are a problem: and have been disabled/uninstalled:  Line Marker (200607), Quick Sum (0.1), Translate (0.6.0.9), gTranslate (0.3.1).  Also as you approach Firefox 2.0.0.12 some extensions that get (not responding) and similar errors.

Main References   [bookmark with a keyword shortcut to documentation]   (#mainreferences)

Also see Major Problems topic near end of this web page.

About (#about)

Research Problems   (#research)

The following keyword shortcut can help you find knowledge base articles with solutions to practically every problem you may encounter in Firefox.

Install as a bookmark:  ( -intitle:talk eliminates docmentation discussions)
Title:  :: Mozilla KB search   (or KB_: Mozilla KB search)
Keyword: ::    (or KB:, or KB_:)
Location:  http://www.google.com/search?num=100 &q=site%3Akb.mozillazine.org+-intitle%3Atalk+%S

Firefox Customizations   (#customizations)

Many things can be customized by creating and maintaining userChrome, userContent, or user.js to solve (or possibly create) problems.  Read more about Customizing Mozilla

Find your profile  (#profile)

Important !!!  Material on hidden files and on finding your profile has been moved to Finding Profile, and Assigning a "profile:" keyword shortcut, and a "chrome:" keyword shortcut.

Create a Windows shortcut as well for your profile directory (#quicklaunch)

Important !!!  material on “QuickLaunch additions for Firefox Usage on Windows” has been moved to another page.

Continued

You can check customizations by typing about:config (also) on the location bar.

Specific Customizations   (also see Firefox notes, above, and see Firefox 1.0 Rediscover the Web)

You can copy the following files example-user.js, example-userChrome.css, example-userContent.css and drop the “example-” from the file names.

c:\program files\Mozilla Firefox\defaults\profile\chrome   <-copy from
C:\Documents and Settings\Administrator\Application Data\Mozilla\Firefox\Profiles\NOP.Default\US\chrome
read about in: Firefox Help: Editing Configuration Files (David Tenser, now --brokenlink--), also see Flii's Tips [--brokenlinks--][ archived versions of Flii's Tips phoenix and firebird are now Firefox], remaining Mozilla.org customizations pages remaining:  Customizing Mozilla (appears as Unix)
Sandbox for link types mouseovers:  (mouseover on a link normally shows hand cursor -- exceptions noted below, prefs)
Normal Link,  With Target="_New" (red background, cross hair cursor),  With Target="_Blank" (red background, cross hair cursor),  Email link (example),  Redirect to false link (pink background),  script (double arrow cursor), 
While looking for examples ran across an unrelated site concerning links, and form buttons with rounded corners (Nifty Corners), this one seems to more than the usual examples.

Firefox Documentation   (#documentation)

The sources of documentation are a changing. 
  1. Support:Article list - MozillaWiki provides the framework for adding more material to mozilla.org aimed at a limited audience that is assumed to be smart enough to read documentation but not smart enough to select a good solution if offered choices.  Aimed at non-technical "MOM", a person who did not install Firefox but is going to try to do what...
  2. mozillaZine - Your Source for Daily Mozilla News and Advocacy
  3. Knowledge Base - MozillaZine Knowledge Base, ocumentation of Mozilla products and applications. MozillaZine Knowledge Base:About - MozillaZine Knowledge Base

Documentation of Personal settings   (#personalsettings)

Some things than can be seen and/or documented(printed to a file).
about:config settings (documentation)
Don't know of any means of exporting (/printing) a filtered listing
Adblock
can be exported and imported as text files
Bookmarks, is bookmarks.html in your profile, can be imported/exported from Manage Bookmarks (Ctrl+B)
(see bookmarks page. — would like means of stripping out icons for documentation usage)
Extensions (list with InfoLister Extension)
Can create text or HTML file, Mine can be found here (InfoLister_Listing) as an HTML file and used my own template.
Keyboard shortcuts (personal)
See the Keyconfig extension (don't know about printing)
Keyword shortcuts
Enhanced Bookmark Search (EBS), and Keyword Bar specifically to view keyword shortcuts, also see my documentation on Keyword shortcuts (don't know about printing)
userChrome.css, userContent, and user.js in chrome, chrome, profile
these are text files and can be seen/printed (may be in Linux form "LF"-format )
Some things to keep watching:
philwilson.org: How to export Firefox's history to a text file,

http://philwilson.org/blog/2005/01/how-to-export-firefoxs-history-to-text.html
philwilson.org: How to export Firefox's history to a text file
Mozilla2:Unified Storage - MozillaWiki

Firefox EXTENSIONS ♦ (#extensions) ♦

What are extensions (#what)

Extensions (documentation):  are small add-ons that add new functionality.  They can add anything from a toolbar button to a completely new feature.

Customizing your Firefox with add-ons, some documentation with loads of pictures for novice users, currently in initial development by Mozilla Support Planning.

Where to get extensions (#where)


Firefox Extensions (addons.update.mozilla.org/extensions), approx 89 433 extensions listed for Windows, this is the ultimate destination after being tested for fitness.  The “More Information” and “Home Page” links normally link to a group page like extension.mozdev.org or to the extension author's own page(s).  Has Popular and newest categories.

compatible:  Whether you look at all of the extensions (1848 Window extensions) or from a search you probably want to look at 100 at a time.  On the Extensions page there is a search form, use the form for any search then on the results page there is a "Show Options" to the right of the search form which can be used to specify your own defaults for a search, which you can use to create a search engine...
 
Create an engine for the searchbar to search for the Extensions by right clicking within the search form (with all default options).  In order to accomplish this you will need to install the Add to Search Bar extension.

Extension Room (extensionroom.mozdev.org. approx. 225 entries (before Firefox 1.5), where authors provide their approved submissions.  Currently shows 120 extensions but not that are shown are available in Firefox 1.5.  You can see them there all at once.  Topics on the mozdev.org sidebar include:  Active Projects,  External Projects,  Project Categories

The latest versions are often on the author's own web pages:  particularly when a new version of Firefox comes out.  The authors websites, if available, have been included in the table below.

Install this as a keyword shortcut:  ext: search extensions -- addons extensionroom add the ext: shortcut to the properties.

If you can't find a Firefox extension, you might still find a bookmarklet or favelet
bmk: search bookmarklet OR favelet add the bmk: shortcut to the properties  

If you want to double-check for additional extensions after you have installed extension first from mozilla.org then mozdev.org you might recheck by looking at active projects at mozdev.org, which can be sorted by name or by date.  You can also look at the FAQ and other topics from the left side frame for some orientation on projects and extensions from the developers (code writers) perspective.

The table of installed extensions on the right can be created by Listzilla or Infolister►.   Descriptions (Title=) can be seen if you hover over the links.   The Listzilla listing is not automatically updated; however, an up to date listing of my actual extensions in use can be found in my /Infolister/ Ext. listing, which is included whenever my site is updated..     

Late modifications:  Just because I disable or eliminate an extension does not mean it was a bad extension.  I have very limited RAM memory and too much page swapping, if an extension has lots of features takes a lot of overhead and I only want one feature, it will probably get removed, and may be reinstalled on a bigger machine.  removals: Clone Window, Compact Menu, and googlebar (there is a much better one built-in to Firefox).  Retaining for now:  keeping (/these) for awhile:  EditCSS (keeping even though it is in the Developer). 

Some ideas of what others feel are important for extensions.  May check these again from time to time, but I've installed those I really need, and avoid those that might be somewhat nice but are large.  Of 54 currently enabled extension, only 14 of those are over 34KB installation size.

Installing an Extension   (#install_ext)

To allow software to be installed you must have:  Tools, options, Web Features (left side in earlier versions) or Content (top) in Firefox 1.5, [x] allow websites to install  software.  (I think there may be no more need to turn off this option as Firefox 1.0 and later will check that the file extension or download is from “trusted sites” that you can change on the link inserted when you get a conflict and refusal to install. 
 

* To protect your computer, Firefox prevented this site (xxxxxxxx.com) from installing software on your computer. Edit Options

The first time you attempt to install an Extension from a site you will get the above warning, to proceed, click on the Edit Option, then inside on Allow, then reselect the extension to be installed, and it should then install.  Do not install an extension you are suspicious of, most extensions you will ever use are from the one of the four locations listed earlier. 

If you have trouble installing your chosen extensions then read more detailed Mozilla Firefox Extensions installation as described in “An introduction to Mozilla Firefox, part 4”.

For URIID at mozdev.org, I had to install the downloaded file by opening c:\download_win2000\uriid.xpi on the Firefox location bar as it would not install by simply clicking on the link.

I specifically will not install the Google Toolbar (extension) as the built-in searchbar is much better and is Customizable.  A Race to the Bottom - Privacy Ranking of Internet Service Companies places Google at the bottom of the ranking.  (letter to Google on Data Protection Policy (not the worst on openess)

Below is a list of Firefox Extensions I have installed and still use most of them.   Most of these extensions are invoked from the Context Menu, see Firefox Right Click menus for the original built-in Firefox Context menus plus some of the additional menus items added by my own selection of Firefox Extensions.   Some extensions are installed in the tools menu, and some have optional toolbar buttons. 

Multiple profiles: is one way of essentially turning off all extensions so you can test w/o or with only one extension – Firefox Help: How To Manage Profiles, Multiple profiles and profile management is an advanced feature, mainly intended for developers.  Unless you are an extension developer or an advanced user, you should probably not be trying to use multiple profiles.

Many of the extensions have additional customizable options, all have disable/enable, more information (about ...), and update, which you can see by right clicking on the extension as found in the listing found with Tools, Addons or on the Find Updates button at the bottom of the Extensions list.

Extensions can be invoked in many different ways so I have tried to identify where you invoke them from, such as from the right-click (context menu), Tools menu, Edit menu, View menu, and even the History menu(Go menu).  Options are usually set in the Extension list (Tools, Addons, select ext, options), but some are in the menus just mentioned.

List of Extensions in use  (#ext) * * * * * * * *

Problems at http://addons.mozilla.org/firefox
Late March 2007 -- Mozilla IT: Continued AMO testing & debugging also see and Mozilla Webdev » Blog Archive » Reviewing, the Sandbox, and “missing” add-ons and Sandbox Review System and Policy progression to pubic area from sandbox. [thread 2007-03-25]

Although all addons presumably were restored at addons on 2007-03-26 that is not actually the case so if still missing you can load from ftp://ftp.mozilla.org/pub/mozilla.org/extensions

If you have an extension installed you can find what the author supplied as homepage via Tools, Addons, and right click on the addon.

Addons_2007 New Format has MAJOR Problems, and in my opinion does not belong in production.

Extensions List ♦ 270 or more Extensions Listed (currently using about 100 of them)

indicates NEW to this list of extensions, and contains the date added to this list.   
  ►  indicates additional information (Requires JavaScript to be enabled for expansion to occur [try here])
conflict,  abbreviation note may be used for definitions or comments (green wavy underbar may not be visible next to a border or underline).

If you use Sea Monkey instead of Firefox, you might want to check for interactions with Sea Monkey.


(italics in Extension column usually means I'm not currently using it) — Where size is mentioned it is the download size (zipped file), if not shown at site may be obtained by Extended Link Properties extension, or approximated by dividing installed size by 3.

A count of the table rows, can be found at the bottom of the table.
A complete Listing of Extensions actually in use, is created automatically by the “Infolister” extension each time Firefox is started and copied to website during website updates.
This table is http://www.mvps.org/dmcritchie/firefox/firefox.htm#ext_table with brief descriptions and usage notes, including how to invoke once installed, also see http://www.mvps.org/dmcritchie/firefox/infolister_listing.htm#extensions
  Extension (#ext)  version  Author  Description     Important information about addons.mozilla.org ►

You have JavaScript turned OFF.  You may have trouble rendering pages elsewhere because  JavaScript is OFF  and especially those at http://addons.mozilla.org

Aardvark 2.9.7
(22KB)		  Bob Brown Allows cleaning up a page prior to printing it   Once you've read the options on the webpage, this is probably the best extension for viewing, examining a section, or printing a difficult to isolate selection of a page.  Select text, right click, start Aardvark, W for Wider (several times), I for isolate, or R for remove, F5 to reset.  Test this [2].  Uninstall pre 2.0 then install 2.0., did not detect Dec 16, 2006 update.
about:me 0.4.1
(46KB)		 leibovica fun way to see personalized patterns (graphs) in browser usage, including trends in browsing history and download activity. (wiki)
About:Search (022)
(xKB)		(surfmind)statistical analysis (graphs) of the user's history, average tab load, etc. Like Google Zeitgeist, but based on (Firefox) Places database.
About Site ♦
(disabled) 		1.5 (11KB) Gina Trapani [1] [2] one-click access to various services that provide information about the site generating a url based on domain/page/selection you are viewing, also has a show all.  [Context]  Nice to see the improvements since domain only (0.4 pre Feb 28, 2007).  Should add Links to this page, and change the archive.org "/*/" to "/*dc_*/" to facilitate comparison.  Can all be done better with built-in keyword shortcuts which work for me, but this extension simplifies things for casual users and keeps them in one place. 
Accessibility
(uninstalled)
(dead-link)		 0.99.1.2283 (Ill.,
/Urbana)		 beta has scripting errors, but is interesting.  Don't need two big menu items added to menus (one menu item of 3 chars would be acceptable) [uninstalled will check again in April 2006] announcements [menus][toolbar]
Next row has been modified to use name, since use of id="adblock" caused it to disappear when using Ad Blocking FiltersetP | userstyles.org (style 299) dated Dec 16 2008.
Adblock ♦ *

Shame/Shame/Shame! This extension is no longer available at addons or at MozDev.

 0.5.3.043
(78KB)		 The
 Adblock
 Crew (34)  		Filters ads from web-pages -- definitely wanted.  Sometimes you can get carried away and block too much, in which case you can use Tools, Adblock, Preferences (Ctrl+Shift+P), to override temporarily or to remove items.   Refer to the Adblock homepage.    Adblock   Some suggested additions .    [Statusbar][Tools][Options]  Ads can be actually blocked rather than just hidden [option Remove ads]. Suppressing ads is a built-in feature of Opera, if that is your main concern. [additional notes] {other extensions:  Many are now installing Adblock Plus (a whooping 309KB, and would also need Blocksite 16KB).  An important feature of Adblock is the list of all blockable items, those that are blocked are in red, and will show the rule that blocks it, very important in maintaining your own filters.  Adblock options explained....
Adblock Plus ♦ * 1.0.2
(309KB)		Wladimir PalantEliminate ads. Ads, particularly third party ads, are a primary source of malware and viruses.  Eliminating ads helps \\ADP// protect your system, speeds up downloads, and helps protect your system.  (video overview) Features: can maintain several independent filter concurrently (EasyList is recommended), plus your own. Easy to add customized filter and whitelist items.  [Options] [Button click/context]
Add Bookmark Here ² Uninstalled3.0.20080915
(27KB)		(author)Add a menuitem "Add Bookmark Here..." to Bookmarks...   Must be done from within a bookmarks folder. (related OpenBook)
Addictive Typing Lessons 3.0 (64KB)Tom Kennedy[typing]Learn touch typing, or improve your typing. [options] [Menu|tool|task bars] (normally disabled)
Add to
  Search Bar ♦
 
   [New Name for extension] 		1.8
(22KB)		Malte Kraus
(Dr. Evil)
*
*
Make any pages' search functionality available in the Firefox built-in Search Bar (/alternative to using Mycroft).  At any site with a search box, set options (if any) then right click within the search field and choose "Add to Search Bar...".  See Customized Search Engine to FIND Extensions at addons.mozilla.org/firefox  Rearrange engines via "Manage Engines" at bottom search engines dropdown.
Advanced
   URL builder
 (♦) (removed)		 1.0.26 James Cook Works the same as built-in Firefox Keyword Shortcuts, except you don't have to type in the word(s).  URLs are added to the Extension's options, and usage is by selecting a word or phrase then using "Find this..." in the Context Menu.  (Menu Editor can place menu in a good location)
Allow Right-Click 0.1.1 Erick Hamiter
  (new site)		 Defeats web sites' right-click prevention scripts.  If not available drag Enable Context Menu to your personal toolbars (preferably a folder within) to install the bookmarklet to reenable.
Anchorun (disabled)1.2.3 (12KB)Giorgio GA_0_Randomly surf to a link on current page.  [button][options]
Answers 2.2.50
(31KB)		Asher Szmulewiczpoint at any word, _0_ hold the Alt+click (pop-up), Ctrl+Alt+click (new tab), Shift+Alt+click (new window/tab), select text(context menu).  Includes an optional sidebar, which of course you would refuse. (topic search)
antipagination
(removed) 		 2005.12.21 383 Combine search results pages and other next pages into one page, (pictures)  [context on Next/Previous links or url bar] Warning:  Google is fine, addons.mozilla.org too much (119 pages with pictures). see repagination which allows limits per use.
Autocomplete Manager ♦ Removed in F3 2.3
(79KB)		Nikitas Liogkasprovides advanced features for the address Autocomplete component in Firefox.  Displays list of addresses with titles based on entry of a string that is within bookmarked url or title. [Options] [Ctrl+Shift+M];  * changed the Shift+L shortcut to Alt+L, after popular request. 
Disabled in Fx3 which has built-in location bar search of bookmarks and history and showing title & url, but no options window. (AwesomeBar)
Auto Context
(of interest, uninstalled)		1.4.53
(74 165KB)		MIKES KASZMÁN IstvánAutomatically opens a customized popup menu when you select text.  A welcome extension when you have a LOT of items in your Main Context menu even after using Menu Editor.  I like the concept but I cannot customize it by simply a context menu item of my choice (for instance first extensions that comes to mind is "Copy URL plus", and "Linky" both happen to have groups)  Interferes with Web Developer Ctrl+Shift+F to examine fonts even if disabled at the status bar.  
Auto Dial
shitlist		6
(6KB)		harikariedA visual representation of your frequently visited pages easily accessible from chrome://autodial/content, which you should bookmark with keyword.  To use Click on Link or use number.  Beautiful report/layout but shitlisted because a new tab (like Ctrl+T) should always be blank. No way to have it not come up except when wanted which would be fun.
Auto Hide ♦ 1.5.4
(45KB)		JochenHide/See the toolbars of your choice in Full Screen (F11/context) [Options] [Context] [Help]  Suggestion:  Show Status bar always, and AutoHide all regularly displayed toolbars.  By moving cursor to extreme top/bottom can see your regular toolbars and Windows status bar though hidden in full screen mode.  Use Menu Editor to put "Full Screen" context menu option at top of context menu.  (Great companions: Mouse Zoom)
Requires secure server override, well worth the extra effort to install.
AutoPager (uninstalled)0.5.2.0
(279KB)		 Wind Liautomatically loads the next page of a site inline when you reach the end of the current page for infinite scrolling of content.  Sites it works with includes Lifehacker, Mozilla addons (releases), the New York Times, Digg, and, of course, Google. Works with JavaScript links. Warning if you do not update to latest version on author's site, you will have problems with horizontal widening of Firefox window (related: PageZipper bookmark works only with normal links and uses an external js file (49KB), suggest keyword of "Pz".)
Auto Site Map (uninstalled)  2005.12.21 383 Auto generate a folder structure of a website to browse. [View,sidebar].  Interesting, but should be avoided as it will drain server bandwidth worse than most webbots)
AVG Safe Search
☹ (uninstall by removing Link Scanner Component)
☹
 (version)
(xKB) ☹		AVG
(grisoft.com) ☹		 Extension was installed as part of AVG 6 Free version end of April 2008, it was not installed from AMO (addons site).  In Fx2 (2.0.0.14) it prevented use of "Enter" at the location bar.  [FAQ 1253] creates other major problems as well in both Fx2 and Fx3 and is not a good substitute for McAfee Site Advisor.  more info ►
Better Gmail (uninstalled)(1.0)
(209KB)		Gina TrapaniA comprehensive suite of Gmail enhancements, including skins, saved searches, keyboard macros, secure access, attachment icons, attachment reminders, label colors, signature floating and more.  You will not see what account you are using so you might want to install a bookmark for https://mail.google.com/mail/?ui=html&zy=s with a keyword shortcut of "gmail:".  tested works, but not what I want for my own email.
Bookmark All Tabs,   Firefox Feature on bookmarks menu [Ctrl+Shift+D] -- Bookmark This Tab [Ctrl+D]
Bookmark Duplicate Detector ☹ 0.7.4
(123KB)		 Stephane BERTIN helps find and delete duplicates URL already in your Bookmarks. ☹
Do not install, if installed uninstall immediately (I have over 2,500 bookmarks) -- MozDev Bug 20647 - Detection of duplicate bookmarks on sort operations,and JSON restores
Use CheckPlaces extension instead.
Bookmarks Scrollbar ▽ (disabled/problem) 1.0.5
(1KB)		jAgx Andrew
Was a nice extension but Firefox 2.0 changes to tabs ruined the extension by placing a horizontal scrollbar over the tabs when using this extension and 22 or more tabs; however, you can do this yourself with simple userChrome changes see Scroll Bars.
Bookmark Sorting (works in Fx2)

For Fx3, see Bookmark Sorting in Fx3 (below).

0.8.1
(8.84KB)		Torisugari
David Lechnyr		There is was an excellent extension written by a guy named Torisugari called, simply enough, Sort Bookmarks, but was never updated. This is an updated/enhanced version.  Sorts your bookmarks.html,   Adds “Sort by Name” to the Bookmarks menu (or perhaps your default sort).  [Tools]  [related: bookmarks manager] Note to form a group for sorting purposes you must use two separators before and after the group or so I think I'm told.  Says it works with Fx3 (Places) as well which will be a database instead of an HTML file.  Fx 3.0b2 has sort built-in see next topic. || of interest Bookmark Sync and Sort, if modified to handle Fx3 bookmarks.
Bookmark Sorting in Fx3
(built-in)

(for Fx2 see previous topic)

 Sorting of bookmarks is built-in to FF 3, context menu ("Sort by Name") is used on the folder or a bookmark and is recursive for subdirectories.  You can't sort on the overall "All Bookmarks", but you can sort from each of it's subfolders in 'Places Organizer' (Ctrl+Shift+B) and in Bookmarks (Ctrl+B): "Bookmarks Toolbar", "Bookmarks Menu", and "unfiled Bookmarks".  You must now select the folder not a file within a folder in order to sort.  Bookmark separators cause groups within folder to be sorted within each group.  Recursive sorting has not been included.

To sort bookmark folders recursively, see SortPlaces ♦.  To quickly access Library list from a bookmark folder recommend also installing Manage Folders ♦.

The "Library List" (invoked from Bookmarks, "Organize Bookmarks") has an additional sort ordering from the Views menu.  Views also specifies which columns will be seen, but is not sticky you have to choose your non default columns each time. 
Bookmarks synchronization  (#bookmarkssync) across browser/computers (search addons) {bad link, but Advanced Search has returned to Addons}
Broadband Speed
Test and Diagnostics		1.1 (35KB) GoTo MyHelpSpeed test, display config (ipconfig), local IP configurations (private IP address, MAC address, default gateway, DNS server, DHCP server, routing table, ARP table, active connections), diagnostic tests (NIC card, local gateway, DHCP server, DNS server, web site) troubleshoot and isolate problems Windows (other Os) [Tools]
Broadband Speed Test and Diagnostics 1.1
(35KB)		DSL SpeedTest(bandwidth tester) speedtest and diagnostic tests (NIC card, local gateway, DHCP server, DNS server, web site), Display (private IP address, MAC address, default gateway, DNS server, DHCP server, routing table, ARP table, active connections)
There are lots of band width testers available that you could use with a keyword shortcut, so an extension is not at all important.  I use one with a shortcut (speed:) and another is specific to my ISP, or one at InternetFrog, SG Bandwidth Speed Test
Browse Images
(uninstalled)		 0.3.5 Juergen Binder Browsing image galleries.  Image links are added to an list which you can access by an icon in the statusbar.  _0_ /(-) To cycle through that list you can use the normal forward and back button and so the forward and back button of your mouse.  To avoid scripting errors and hidden activity try to avoid looking at a directory of images when this extension is enabled.  *Alt+ArrowRt* After installing read the test page to see how this extension works with the Forward button such as with the Wikipedia images page. Browse Images is disabled because I don't need it at this time.
BugMeNot
 (uninstalled)		 1.3.1 Erick
  Hamiter		 Bypass compulsory web registration, right-click on username or on password. The big sites automatically reject these so it is rather limited where it will actually work.
Button Maker (interface)Michael Buckley pagecolors Custom Toolbar Buttons Maker, making a customized version of just the buttons you want; thus, keeping the file size as small as possible. Just tick the check boxes, hit Submit, and you have a customized version of Toolbar Buttons for your very own.
Cache View1.61
(34KB)		Steve
  Janovitz (down)		 Displays Cached files (Google, Coral's, Wayback Machine's, Dot, etc) of the current tab.  Help see content for lost/missing/busy sites. [Tools][Context] (doesn't seem to work for his own home site which is parked)
CacheViewer0.5b4
 (26KB)		benkiGUI Front-end listcache entries of "about:cache" [2].  Allows searching and sorting memory and disk cache files.  i.e. filter on JPG then sort on time, use down arrow to browse through the files.  You can see additional columns or sort on other columns by clicking on little icon to right of rightmost column header.  Display rows have a context menu to browse, save, or delete. [Tools] (Cache contains even more... Web Browser Forensics)
CheckPlaces ♦
(experimental)
(not wanted)		1.2.0
(35 KB)		Andy Halford basic checking of your bookmark URIs, with optional checks that the pages still exist, checks for duplicate bookmarks, and for empty folders.  Provides bookmark counts.  The options list of what to check comes up each time it is invoked. [Bookmarks menu] [Tools] [Context] [Statusbar]. -- I need duplicates much more often than duplicates would ever cause even a minor problem. Duplicate folders can be annoying, though valid, should be renamed if using Star bookmarking to a recent folder.
Checky (not available)  2.5 Joachim Schreiber interface to many free and commercial Online Validation and Analysis Services.  Validate and analyze HTML, XHTML, CSS, RDF, RSS, XML, WAI, Section 508, P3P, Hyperlinks, Metadata and many more. [context, tools]
Even though this is NOT available for Firefox 1.5, there is Web Developer, and bookmarklets, and bookmarks for all kinds of references and checking.  Most of my syntax checking is done with HTML-Kit invoked through Launchy.
chromEdit
(not installed, senseless solution to a senseless problem)		0.2.2 (30 33KB) Chris Neale,

 Brian King		 User File Editor - lets you customize your Mozillan application [ Moz, Fx or Tb ]
ChromEdit is a User File Editor for all the major Mozillan applications which lets you edit userChrome.css, userContent.css and user.js from the comfort of your app. and still not know the location of your profile, nor help with other profile items. 
A more practical approach is to create QuickLaunch shortcuts (in Windows) instead.  The most practical solution, especially if you have multiple profiles, is to install Open Profile Folder in each of your profiles.
Chrome List ♦0.4 (43KB)Gijs Kruitbosch Lets you take a peek at the folders, files and code within each of your extensions [Tools, Explore Chrome] (also see ref)
Close Tab(2x) (♦) (disabled) 1.09 (2KB)Pavel VlasovClose current tab by double-clicking it.  "Close Tab by Double Click"
Won't work with Multiple Tab Handler, but Tab Clicking Options (29KB) will.
Clone Window
(uninstalled)		 0.2.4 Pike Clones the current tab's address and history into a new window when the New Window command (Ctrl+N) is used, and optionally into a new tab when the New Tab command (Ctrl+T) is used.  (see Duplicate Tab)
Codetch
(uninstalled)		 0.3.6.2005
1230		 Zachary
   Carter ?		 a full featured editor right beside your web pages as you surf! [tools]   uninstalled -- lacks documentation, never had very good experiences with WYISWYG editors anyway.
Colour Contrast Analyser .96
(55KB)		Gez LemonDetermine if color contrast of text background is sufficient.  As an aid to compliance to Web Content Accessibility Guidelines 2.0 (w3.org) [context]
ColorZilla ♦ 2.0.2
 (136 159 KB)		 Alex Sirota Eyedropper (color sampler, status bar options), ColorPicker, Page Zoomer (similar to Opera's zoom ►), DOM inspector (if present)  – See features there are lots of subtleties and options (see ext options, status bar options, context options)  Note [footprint, will tolerate no more than this one to left of status bar]
  statusbar choices:    %hex% | %element% | css: %css-size% | box: %box-size%
Crashes Firefox 3.0b1
Compact Menu
  - Blue 		Frank Lion(blue)Replace the menus with a button (blue ball) to invoke menus.  [icon] Move icon to menu bar from customize.
Context Highlight
  ♦
0.3.2
(15KB)		 Ben Basson (Cusser) Lets you highlight all instances (multiple instances) of a string/word/phrase then color (yellow) directly from context menu "Highlight Words" (slow), or "Highlight phrase".  Must use Ctrl key when invoking context menu to add additional markings..  Reload (F5) clears. (also see line marker, and Text Marker ext.)
ContextMenu
 Extensions
 (uninstalled)		 4.0.
 20060113001		 Shimoda Hiroshi Read this as help document ContextMenu outsider reflex.  Late in getting updated to Firefox 1.5 (it is compatible with 1.5.0.1), has many features basically on my wavelength since it includes same functions as some bookmarklets I created, it is a self-contained conglomeration similar to construct of Web Developer, best parts are stylesheets (esp.  Show Elements Model) and other shortcuts (can fix in Menu Editor).  Disabling Find as you Type (find problems page) would probably enable you to use the extensive and logical single key shortcuts because someone changed Firefox Find.  Firefox would do well to implement most of things in this extension -- regrettably uninstalled same day
Context Search ♦ 0.4.1
(9KB)		Ben BassonExpands the context menu's 'Search for' item into a list of search engines.{related:  Add to Search Bar, MyCroft, searchbar, SmartSearch}
Copy All Urls ♦ 0.9.0
(100KB)		 Juergen R. Plasser Copies all URLs of open tabs in structured form (plain text, html, ReST = ReStructured Text) to clipboard.  [Edit][context - Copy All URLs as...] 
 HTML:  <li><a href="$url">$title</a>   – [x] Copy only URL (no title) – Sort on title
 Text:  $title in first box, $url in second box   – [x] Title before URL – Sort on title.  Generated content is customizable.  [Edit] [Context]
 Copy Link Text (CoLT) (uninstalled) 2.1.1
author's site		 Jonah BishopAdds “Copy Link Text” to the context menu, also has customizable link options similar to CopyURLplus, but content is strictly from a link and appears on the main context menu.  (related)
Copy Plain Text(redundant) 0.3.3
(6KB)		  Jeremy Gillick  [2] Copies text without formatting   [selection + context menu]  Redundant by Extended Copy extension, and by PureText which can be used between any applications since it changes content already copied to clipboard. [Ctrl+Shift+C] 
CopyURLPlus
          ♦

! (compatibility see note under author) 		1.3.2 (18KB) Philip
  Mateescu
 
! (a user modified vers 1.3.2 for Fx2, and for Fx3)		 Copy to clipboard a single link via context menu as a formatted link the document's URL along with the title or the selection.  Can be used also to convert text to HTML formatted code.   Besides the home page for this extension be sure to look at the Customize Copy to really understand this extension.  (also see my notes (above), more extensive info & problems (on another page), and as seen on Firefox Right Click menus) [edit] [context menu] cat:misc.  Related extensions:  Copy All Urls, Document Map, and CoLT with limited options from a link.
CSS Viewer1.0.3 (16KB) Nicolas Huon A simple CSS property viewer. [tools(/toggle)] Display font-size and other CSS information at the cursor.  (overlaps WD Display Element Information Ctrl+Shift+F toggle)
Custom Toolbar Buttons Maker (version)
(xKB)		Michael Buckleya simple way of making selected buttons of Button Maker that has just the buttons you actually want.
Customize
   Google
          ♦
 0.76
(43KB 290KB)		 Customize
Google		 Enhances the Google search results by adding extra information on WEB searches (like links to Yahoo, Ask Jeeves, MSN etc) and removing unwanted information (like ads, and spammy sites) with a filter.  All features are optional and easily configured from the options menu.  Helpful in overriding Google cookies should they get changed.  The streaming option allows you to effectively have more than the 100 max hits, by allowing you to scroll past the limit to pick up more items.  [1] [2] [3] [4]
Works only from Google toolbar, or using a keyword shortcut not from search box at Google.
Differences between a signed in Google user and an unsigned in Google user, as seen at the top of the search results necessitates additional use of another extension GoogleEnhancer
  Options to set only in CG -- streaming (not position counter, nor show favicons)
  Options to set only in GE -- Load results favicons, Number Results Nevertheless, being signed in to Google really slows search down, and prevents CG streaming(next pages) for getting additional results at the bottom, and challenges you as being human -- so you really should sign out of Google when doing searches.
A recent change (0.52) hides the suppressed urls, to see them again you will need to show the title with the mouse or with a bookmarklet paren tips
Suggested options: Remove ads, Add position counter, Remove click tracking
Loss of icons on search results even though Customize Google has "show icons for web pages" will be lost when signed into Google.  Experiment with combinations so that you see the actual icon of sites and not Google icon for all results or no icons.  If you do not see the icons you will not see the important replacement icon on the left, (!) advising of an attack site [ref].  Google adds the warning "This site may harm your computer" which is easy to miss, fortunately Firefox itself will block such sites (Tools, Options, Security, [x] block reported attack sites). (see style 16887, incorporating part into style 16842).
Being signed into Google will mess up Google searchs, especially if using "Customize Google", so there are some additional features to be used from Google Enhancer instead of same feature in Customize Google.
Dafizilla Table2Clipboard, see Table2Clipboard as it is known in menus and at Addons
DejaClick

[DO NOT INSTALL] ☹

2.0.0.1
(1,098 KB)		AlertSiteDéjàClick is a web recorder and Super Bookmark utility designed exclusively for Firefox. You can record and bookmark your browser activities, then with a single click, replay the entire sequence all over again.  ☹Will be tested primarily to see if it works for presentational purposes, but this is one very large extension, and if it bookmarks it probably is not compatible with multiple bookmark exclusions of Firefox 3. One h*ck of an indemnication release agreement, callbacks. ☹[UNINSTALLED within 5 minutes insufficient resources, BROKE FIREFOX, can't run JavaScript even though options say it is on]
dictionaries:  Using the spell checker, SpellCheck (extension), SpellCheck: (bookmarklet)-- have a problem with all spell checkers they all claim to use persdict.dat whether they can add to dictionary or not and no such file exists in profile. about:config (filter on: spell)
DictionarySearch
 ♦
 3.5.4 (50KB)Jaap Haitsma Looks up selected word in up to four online dictionaries, each choice uses a context menu entry.   Yahoo dictionary has free pronunciation, can be changed or added in options or via about:config [context menu] -- http://education.yahoo.com/reference/dictionary/entry/$
Document Map ♦
 (♦ must have )		 0.6.1
(20KB)		 James Graham Displays the current page's H1-Hn heading structure (indented by heading level) in the sidebar, allowing rapid navigation between sections.  Useful to ALL users.  [View Menu, Sidebar, or Alt+O]  more info ►
This extension is a must have extension to create an index of topics so you can see the structure of pages such as mine.  Bad blocks of hide/show JavaScript can cause "document links" to fail.
Because of sophomoric decisions by the Firefox Development teams, you will to jump through some hoops to install this extension.  To turn of compatibility testing and/or to accept from another site see turning off compatibility testing, you do not have to use Nightly Tester Tools, or muck with the download in order to install.
Alternative:  HeadingsMap (80KB), colors selected heading, header# shown, iframes, rest is same. <h/> diff
  documentation and finding things:  --   extensions: Document Map, Launchy, PageDiff,   methods: Find (but Opera's is Find is better and you can use Launchy to get to it), Find All, Keywords, search,   Utilities (external):  Agent Ransack (Free version) search locally.  -- (also see topic documentation)
domainFinder
0.3
(7KB)		PaulMccarry out whois lookups on any url on a webpage or carry out a keyword domain search on any highlighted phrase or text.  Choice is at website rather than extended context menus. [link context menu]
Can be implemented strictly as a bookmarklet (no extension needed) to get the information for the current page (see "domainfinder:").
DOM Inspector (Fx3 only)2.0.3
(120 KB)		Shawn Wilsher
  (sdwilsh)		 Inspects the structure and properties of a window and its contents. use to inspect and edit the live DOM of any web document or XUL application.
DOM Inspector (built-in Fx2) 1 Joe Hewitt A powerful tool for viewing and manipulating documents.  [context(ctrl+Shift+I)] (KBarticle, also see project)
Download Helper see Video Download Helper
DownThemAll! ( not installed)0.9.9.10
(473KB Hugh)		 Federico Parodi, Nils Maier, Stefano Verna download manager/accelerator lets you download all the links or images contained in a webpage (features, video) [context|tools|button] More infos here: http://www.downthemall.net/main/install-it/downthemall-10-beta/
Drag to Tab
(built-in) ♦		 Firefox 1.5 built-in Awan Afuqya Drag a link from anywhere for tabbed browsing.  The advantage is that even if the tab bar is filled up, you can drag a link or paste a link onto the Start New Tab built-in Firefox button in Customize (you can also drag to the New Window Firefox button).  I use only the New Tab icon, shown on to the right.  For other choices I prefer to use reversed tabs shortcuts:  Ctrl+Click on a link for new tab, or Shift+Click for new window, or Ctrl+Shift+Click (background) for new tab but not leave current tab.  [tool bar] Now included in Firefox.
Duplicate Tab (♦) (disabled) 1.0.2
(53 134KB)		 twanno
 Duplicate Tab   (to New Tab) Ctrl+Shift+U
 Duplicate Tab to New Window Ctrl+Shift+N
 Detach Tab   (to New Window) Ctrl+Shift+C
 Merge Windows Ctrl+Shift+M
Duplicate a tab to a new tab (Ctrl+Shift+U) or to a new window (Ctrl+Shift+N), and it allows you to merge different windows (Ctrl+Shift+M) in one window.   All three actions can be invoked through the tab's context menu or through
(*) ...
shortcut-key's.  Ctrl+click on Tab will generate “(*)” prefix to the tab's title.  Documents preferences usage with conflicting extensions with similar features (Tab Mix Plus, Mouse Gestures).  Ctrl+Shift+T reopens tab see keyboard shortcuts.  Use of Menu Editor extension may result in duplication of tab context menu with tab context submenu items if both had been exposed to Menu Editor, use ME to suppress unwanted duplication. Fx3 will feature part of the functionality using Ctrl key while dragging the tab (basically a lie, Fx3 does not replace this extension).
Disabled in favor of Multiple Tab Handler (38KB).
Edit Config Files
(uninstalled)		 1.5.7 s2works Edit configuration files with your favorite editor from Toolbar or Tools menu. Additionally, it can open your profile folder.  Profile shortcut already used by AdBlock, suggest using your own profile: and Chrome: keyword shortcuts based on about:cache instead.  The big advantage of this shortcut is that you can install all extensions you want at one time and quickly edit during your initial installation of extensions.
EditCSS 0.3.7(29 153KB) Pascal Guimier Stylesheet modifier in the Sidebar.   Not needed see Web Developer
Enhanced
Bookmark
Search (EBS) ♦ obsolete		 0.1.4.04.1 (27KB> AnonEmooseSearch by Title, Location, description or keyword including modifiers of contains, starts with, ends with, is, is not, doesn't contain.  [bookmarks menu]. 
Enter Selects (uninstalled)vers. 4
(2 KB)		Edward Lee
(harikaried) (edilee)		Press [Enter] in the AwesomeBar to select the first choice.  Since you've already used keyboard to use AwesomeBar, keeping hands on keyboard is useful w/o using arrow or mouse.  Uninstalled -- interferes with use of Keyword Shortcuts.
Extended Cookie Manager
 
(Fx2 disaster, ok in Fx3) 		0.9 (21KB) Sven Jost //eecm// detects if a website sends a cookie and shows if this cookie was blocked, allowed or only allowed for session in the statusbar of your browser.  It also enables you to change the cookie permissions of websites on demand. [options] [task bar]
Extended Copy Menu ♦1.6
(11 84KB)		Ryan Cookadds a "Copy As Html" and "Copy As Plain Text" to the context (right-click) menu. (IE version also available) [context] (also see ref)
Fx3 "Copy As HTML" not working in Firefox 3 Beta (3.0b2)-- oops only fails in this area (local drive). Went from 11KB to 84KB with version 1.6
Extended Link Properties ♦1.2.4
(15KB)		 Torisugari
/ Jane Ocean (Seamaiden)		 Extends the Link Properties and displays File Size, Last Modified Date, Content Type and HTTP Header of a link target. Get File size of a link.  [link context as Properties] (picture) [alternatives: Named anchors, Get File Size, bookmarklets]
Extended
  Statusbar
(uninstalled)		 1.2.8
(7 KB)		 Strahinja Kustudic {Bad Link} A Statusbar with Speed, Percentage, Time and loaded size (HTML files, images, audio or video,
Images: 33/33 Loaded: 40 KB9.74 KB/sTime:0:04
Flash animation, etc.).  (disabled uses way too much real estate) alternative:  web developer
Extension Manager Extended ♦2007-02-19 -- 10kb
2.8.1 (12KB)Paul Spangleradds view the id, date installed, and the folder of an extension or theme. [addons] (picture)  Also see Chrome list
FEBE
Firefox Backup

(not installed)		5.3.1
(771KB)		Chuck Baker
(profile)
 FEBE backs up your extensions, themes, bookmarks, preferences, passwords, cookies and just about everything else Firefox offers (it can even backup/restore your entire profile).  You can selectively restore only the items you need.  Beyond just backing up -- It will actually rebuild your extensions individually into installable .xpi files.  Now you can easily synchronize your office and home browsers.
Find (built-in)The Find in Opera is much better than the Find in Firefox as it will never hide the found string behind the built-in Find Bar.  You can use the "Launchy" extension to switch to an Opera page (or any other browser or editor) from a Firefox page. (You may have come here looking for Find Problem).  Firefox 3 has incorporated "Highlight All" into the Find bar (you can modify appearance with style 7566), so if you use it first then Find it will work very much like Opera.  Also check out "Context Highlight" extension if you want to have more than one choice highlighted such as "Firefox" and "JavaScript".
Find All 3.0
(33KB)		Justin Rodes replaces the find bar's Highlight All button (by default) with a “Find All button”, which highlights all search terms found and [Find All] displays them in an easy to view list of words in context and total items found. Separator bar above list is draggable.  [Options]
/Find Bar/
(alpha stage)
Disabled		1.0.1
(214 711KB)		(author)adds "Regular Expressions" to the Find Bar.  Implemented with the JavaScript engine so check the JavaScript RegExp syntax for the full details.  Use "/bexcel/b" to find the word "Excel".  Could be disabled because not really into RegExp yet.
fx3 (2008-04-13) Prevented Find from working Ctrl+F and from Edit, so Disabled, reinstalling did not work.
File Title 1.3 (3KB)Pavel Cvrcek
(JasnaPaka)		save HTML pages like in Microsoft Internet Explorer.  Default filename is generated according to HTML tag TITLE. (not installed but of interest (.mht, .mhtml, .maff) fix for bug: 254139. Alternatives: Scrap Book, UnMHT for Firefox)
Find Sidebar
there is no such extension, but it would be nice to have one, as was a suggestion by Michael Schonfeld (mockup. 
FireBug 2006-12-10 Asa (uninstalled)1.2.0b3
 (417KB was 105KB)		Joe Hewitt
/disabled/   /ok/
/x 22 errors/
All of the tools you need to poke, prod, and monitor your JavaScript, CSS, HTML and Ajax are brought together into one seamless experience, including a debugger, an error console, command line, and a variety of fun inspectors. [context menu at status bar]
Firefox search sidebar(installed addon name) from searchsidebar project (search engines), see search sidebar (below), also badly named as viewsearch sidebar (as seen in view, sidebar Alt+K).
Firefox Showcase (uninstalled)0.9.4.8
(203 KB)		Josep del Rio provides a small preview of other tabs and windows as active thumbnails. [View] Easier to setup, but I think Split Browser may be more practical. Possible problems with F11&F12.
FirefoxView
(installs on IE)		 1.31 Alex Sirota View pages and links loaded into IE in Firefox (see earlier topic note)  [context menu of IE]
FireFTP 1.04, 583 KB, will uninstall for now anyway.  FTP transfers, directory comparison, syncing directories while navigating, SFTP, SSL encryption, search/filtering, integrity checks, remote editing, drag & drop, file hashing, and much more!
FireShot (just a quick test/uninstalled)0.55
(792 KB)		 susbox Adds the ability to take a screenshot of web page (entire of visible part), edit it, add annotations and upload to server, save (PNG, GIF, JPEG, BMP), copy to clipboard, send to external editor or e-mail it. (I use SnagIt®)
Flash Got
(uninstalled *)		 0.5.96 Giorgio Maone Enables Mozilla and Firefox to handle single and massive ("all" and "selection") downloads using the most popular external download managers for Windows.  FlashGot also overlays the "Opening file" Firefox dialog, giving you a chance to override the default download manager just before it starts.  FlashGot correctly dispatches the referrer URL (which I suppress, oh well) [documentation, screen shots]   Haven't really figured out how to use or if wanted.  Disabled due to context Menu bloat  Flash Got & Browse Images are disabled because they appear to affect Platypus including disappearance of Platypus from the context menu.
Flat Bookmark Editing
(uninstalled)		0.8.1
(10KB)		chouser Edit bookmarks <Ctrl+P> in the bookmark organizer, without opening the properties window. [View Menu - Properties (Flat Bookmark)].  Too distracting. (obsolete in Fx3)
FormFox 1.6.3
(9KB)		Daniel W. Steinbrook displays data destination for your entered form data, from search boxes to order forms, mouse over the final Submit button to reveal the destination.  Forms using JavaScript will show as "possible trickery.  A button turning yellow indicates that the form is being submitted with encryption (over HTTPS).
FxIF (Firefox exIF) 0.3.1 (30KB) Ted Mielczarek view a quick summary of the EXIF data contained in JPEG images from the convenience of your Firefox browser.  (IrfanView for more complete information).  Most digital cameras add this data to all images you take.  [added to Properties on Context menu] test pictures
Gmail Space (as seen in addon) see GSpace
GoogleEnhancer 1.70
(14KB)		NettiCatLight-weight Google enhancement -- Adds: Icons, Numbering, Highlighting.  Problems noted in comments: only works for url like:  http://www.google.com/search?q= , results lost if using StumbleUpon.  Being signed into Google messes up several items when using Customize Google, choosing the same options in GE instead alleviates some problems (see Customize Google for more information).  Load result favicons, Highlight results, Number results, Time search option, Filetype search option.  Then in Customize Google turn off: Show favicons, and turn off Add position counter.  Being logged into Google may still sometimes mess up the streamimng option (repagination) of Customize Google so it is still best to sign out of Google when doing Google searches.
Google Notebook
(uninstalled) 		1.0.0.5  Save scraps into notebook via context menu. (intro, newsgroup)  Notes are stored at Google.  [Goggle Notebook] [context -- Note This (Google Notebook)] [Statusbar (Open/Close Notebook)]
Go Parent Folder ♦ 2.0
(6KB)		Alice White Locate the Bookmark folder for a Bookmark in Bookmarks search results.  Adds "Go Parent Folder" to context menu. [context of a bookmark search result] [Option].  Also install Show Parent Folder. [forum help]
Grab and Drag 2007-06-17 104KB2.7.4.3
(120KB)		Ian Weiner [Grab and Drag] Enables grab and drag scrolling. [Tools for options][icon (toggle)]
Greasemonkey
♦ *
 0.8.20090920.2
(140KB)
 
(used to be 22KB)		 Aaron Boodman, Anthony Lieuallen, Johan Sundström   [search]
 and
Jeremy Dunck
  [list] [blurb] 		Adds bits of DHTML ("user scripts") to any web page to change its behavior.  In much the same way that user CSS lets you take control of a web page's style, user scripts let you easily control any aspect of a web page's design or interaction.  Doesn't stop anything from being loaded up so you still can get unwanted things happening, but does eliminate items from displayed content so you don't have to look at unwanted fluff and can't click on things you don't want anyway.  * * Modification is through Tools, Manage User Scripts — use Edit to modify, uninstall to remove an entity.  Platypus makes preparation easy.  Greasemonkey alterations can be turned off or on with the taskbar button (shown on right). [using,  UserScripts (repository), online manual] [edit entities at Tools, Manage User Scripts]  more info ►
Gspace
(of interest) (Gmail Space)		0.5.991
(206KB)
from 206KB for Fx2		Rahul Jonna [tnarik] allows you to use your Gmail Space (4.1 GB and growing) for file storage.  It acts as an online drive and to manage unlimited Gmail accounts to store all type of files within its simple, user friendly interface..  Has it's own FTP layout.  GMail limits 500 and 750 emails (equates to files) per day, you can log into only one GMail account at a time (cookies).  [gspace] Comment: "good for don't have rights to insert and use a USB drive", but wouldn't you have to have the extension installed to use it, so doesn't sound like something to use in a library/kiosk || "double backup thumb drive; calendar, appointments, text, bookmarks, e-mail addresses" -- uploading an entire thumb drive at once could get your ability to use GSpace disabled forever. /\). Keep transfers under 1GB/day; NOSCRIPT extension must be disabled.
gTranslate (uninstalled) 0.3.1
(30KB)		Pau translate selected text in a webpage using Google translation services. [Context] Bookmarklets work well for translation -- gt: google translate
Hide Caption
(Hides Title) (Uninstalled)		0.53
(8KB)		GOLF-AT Hide the title bar (caption of Firefox), displays Minimize, Maximize/Restore and Close buttons on the menubar/nav-bar.  What I really seek is a means to reduce height of title bar not remove it.  Alt+Spacebar and arrow keys need to move window.
Hide Menubar (♦) (disabled)1.0. 20080310
(15KB)		yuoo2kToggles Menu Bar Display with simple use of ALT key.  Does not interfere with other "Alt+" keyboard shortcuts.  Looked good but can't use searchbox which I have on the menu bar.
HighlightAll (presentation) 1.4
(13KB)		 Jerome Goudey Highlight and count all occurrences of the selected text with just a click (substitute to Ctrl-F with highlight option). Another click in the document removes highlighting. HighlightAll displays in the status bar how many times the selected text was found.
Does not provide the advertised count (occurences); Opera does this much better/faster/default.
Highlighter (presentation)0.1.4
(12KB)		Terry YuenAllows you to highlight text on a webpage by selecting it and clicking 'Highlight' on the popup menu. If you hold down the Shift key while opening the popup menu, a sub-menu appears with more advanced options.
Major features include an 'Instant Highlight' function, a tracker system to keep count of how many highlights were made, a warning dialog when trying to leave a page with highlights and more.
History Tree 1.1 (75KB)FoxTreeshows your browsing history of current tabs as a tree of tabs in outline form or in thumbnail webpage pictures as in ShowCase.
HistProp0.2.3.4 (22KB)Andrew O. Shadoura Adds a Properties item to the browser's History viewer context menu to provide the url location.
HostIP.info Geolocation
(not installed)		0.4.3.3
 (28KB 30KB)		Matt Walker Displays Geolocation information for a website using hostip.info data.  Shows URL, IP, Country, City, coordinates.  However it no longer shows the Firefox default of Title.  May help identify phishing scams. [mouseover] [options]
Hotmail Tabs
 (unsupported)		   0.9 flatline formerly Ben Basson (Cusser) Microsoft changed Hotmail's link handling so that it was done entirely through JavaScript, this stopped everyone (any browser) opening new windows or tabs for their mails etc.  This extension is the once was a solution.
How'd I Get Here (uninstalled)0.1.2
(10.6KB)		 Jesse Rudermango to the page on which you first clicked a link to the current page.[toolbar]. 0.1.2 no longer works in Fx3.0.7  Tab History was suggested as a replacement but has too much overhead.
Html Validator :: Firefox Add-ons 0.8.5.6
(2689KB)		Marc Gueuryadds HTML validation inside Firefox source view using HTMLTidy. (Installed to check out a reported problem, I use and prefer HTML-Kit, since you can actually change the source)(uRef)
Hyperwords
(uninstalled)		5.0.1
(806 KB)		Hyperwords TO USE Hyperwords select any text (single word or more) and select a command from the menu.  There is quick showcase display, click on a command takes you to the article.  If this menu gets in the way right-click to get on through to the main context menu, or hit Esc to make the mini Hyperwords menu disappear.  Customizable menu and behavior.  [Demos 1, 2][Context/Preferences]
IE8 Activities for Firefox (uninstalled)0.7.3
(34KB)		Michael Kaply Activities is a new feature in IE8.  You can get more information here
IE_View (redundant/uninstalled) 0.84 Paul Roub Open pages in IE, Right click on web page, or on a link   [context menu]
 Great extension but Launchy makes IE_View redundant.
iMacros for Firefox (looks interesting, not installed) 6.0.1.2
(177 198KB)		iOpus Automate your web browser.  Record and replay repetitious work. iMacros has many uses: Form Filler, Web Automation, Data extraction/Web Scraping, Web Testing. unrealistic runup of version from 0.8.0.2 in one month to 6.0.0.2
ImageBot (possible future use) 2.5.8 jAQx Bulk/Batch/Mass Image Uploader! ImageBot allows lets you upload your images to a free image hosting service (ImageShack or Photobucket).
Image Zoom ♦
  ( Zoom Image )		 0.3.1
(82KB)(108KB)		 Jason Adams Right click on an image and select a zoom option from the popup menu, or, hold down the right mouse button in combination with the mouse wheel to zoom in or out on a single image image.  Obtain from the author's site.   Options, View and Context Menu.   A feature of Opera (/***\) is to be able to zoom all text and images at same time, and so can the ColorZilla Firefox extension, or with MouseZoom(all text and images which is compatible with mouse functions of imagezoom). [appears similar: zoomFox]
ImgLikeOpera
(dialup usage)		 (90KB)Danil Ivanovload only the images that you want.  Appears it would be very useful for dialup users.
InfoLister ♦ 0.10.1
(140KB)		 Nickolay Ponomarevsome system information and list of installed extensions, themes and plug-ins.  Option to specify output file.  [tools] [templates (archived documentation)]   /example/ (recommended for everyone as a means of documenting installed extensions)
Fx3: When Firefox starts or any other time the Infolist extension is invoked get "not well-formed" error in message console caused by prefix in template -- text/html;maxversion HTML;<!DOCTYPE ... --

An alternative Extension List Dumper, 48kb, lists Firefox min-max versions found in your copy of the addon, without flexibility of HTML template.
Inspect This 0.9.1
(11KB)		  Laurens Mackay (9452) [=O] Inspect the current/selected element with the DOM Inspector* [Context]
InspectorWidget 2.11. 20090429
(50KB)		Sailfish [=O]  Inspect this Frame
 Inspect This page   Ctrl+Shift+I  adds a toolbar button and context menus for invoking the DOM Inspector (DOMi) extension, for either chrome or content elements.  Picture of Dom Inspector relating to the "Inspector Widget" button (also see picture and code in Style 13115).  Keep disabled until needed as it caues menus to become permanent attachments when Style 52 - Scrollbar Menu is used.
In The News :: Firefox Add-ons 0.0.2
(3KB)		Kurt Wilms Highlight text in Firefox, right-click to see the latest related news stories. Mouse over any of the headlines to see a brief summary of the story. Click on any of the stories to have it open up in a new tab. [context] "
It's All Text! 1.3.1
(124 KB)		Christian Höltj>br>(docwhat) Right click on a textarea, select "It's All Text!" and edit the text in the editor of your choice. [button][options]
iWEBTOOL (uninstalled)1.0.05 (36KB)iWEBTOOLWebmaster's Toolbar, information about websites quickly [statusbar] (statusbar HOG to be disabled) Reliant on a home site with loads of ads and appears to be content of other site pages. (here are the included web tools)
Interfers with use of Scrollbars (style 52, 54, 56) added with Stylish [ref], so suggest keeping disabled when not needed.
Java Console, don't know why it appears (and appears twice at that) in Infolister listing as there is no such addon installed.
Javascript Command 0.0.8
(9KB)		max1million For writing/testing javascript on Firefox windows (extension development, etc), web pages, and bookmarklets. [Tools]
JSView 2.0.5 (95KB)Ron BeckmanView external JavaScript and CSS source [View][Tools][StatusBar][Options]
Key ...More usage information on other pages ► Keyboard and Mouse Shortcuts,  and Keyword Shortcuts Keys to symbols used on this page
keyconfig ◈
 		 20060828.1
(4KB)
 
! Use author's site 		Dorando ◈ allows you to change any existing keyboard shortcut to another shortcut, or remove a shortcut. [options][tools]   Using default Ctrl+Shift+F12
Not nice to have to change keyboard assignments but was very necessary (◈), the extension is very useful in identifying keyboard shortcut conflicts by sorting on key.  Additional documentation.  and more items: [1 [2] [3] [4] [5] [6] [7 [8]
KeywordBar ♦ ▽ 0.3.3
(24KB)		 Cory SchmidtShows a sidebar [Ctrl+Shift+K] with all bookmarks that contain a defined keyword shortcut [picture| pict2].  Double-clicking on a keyword will insert it into the URLBar (Location Bar) for quick access.  Context menu includes properties, and Bookmark Manager (or EBS) [EBS filter on keyword not equal to "a" is somewhat of an alternative]
Disabled 0.3.3 in Firefox 3, shows an empty window will have to use Keyword Manager (below), no longer works in later Fx2 or in Fx3.
keywordManager ♦ 0.7.2
(16KB)		Regis Casparmanage bookmark's keywords.  A toolbar button is added to the "Bookmarks Organizer" as the "Library" window in upper right corner (pretty much hidden from [keywords] general use due to location and black letters on dark background).  And a small dialog popup when this button is pressed showing all existing keywords.  Each listed keyword can be double-clicked to be edited.  Finally, some filtering capabilities are present to help finding a specific bookmark/keyword. [Button]  The bookmark listing is ordered alphabetically in a case-sensitive way. Filters match against bookmark name or keyword [should not be as keywords are not case-sensitive].  There is a similar extension by Cory Schmidt, working on pre-Places Firefox versions named KeywordBar (above), which I liked better as it worked from a shortcut.
KGen (disabled)0.2.1 (24KB)Nicolas FroidureCounts for every word on a page, separate for HTML tags and attributes [sidebar]
 Launchy ♦
  [home]		 4.2.0
(28KB)		 Henrik Gemal (59) Launchy will enable you to open links and mailto's with external applications.  Browsers, media players, FTP clients and download managers are supported.  That's applications like IE, Opera, Mozilla, Notepad, HTML-Kit, IrfanView Outlook, BSPlayer, Windows Media Player. [rel. 2004-10-26, 118 KB] [context][Tools/submenu] (also see ViewSourceWith) — [notes]  more info ►
Line Marker 2.0 .2008 040702
(17KB)		 SHIMODA HiroshiAdds “Line Marker” to the context menu of a selection with a choice of pen colors.  Changes are saved with profile.  "Clear all Markers in this ..." resets. [context].  (also see context highlight ext.)
Link And Forminfo (not installed)(version)
(15KB)		Alice White Restore Linkinfo and FormInfo which has been deleted from PageInfo of Firefox3.  You can sort any column in the Link Info and Form Info. Open new tab by double click in the Link Info.  This extension does not seem to work on MAC.
Link Checker
(Check Links) 		0.6.3
(29KB)		 Kevin A. Freitas Nice concept color coded link validator, but it is slow checking one link at a time, and easily interrupted.  [context*]  Alternatives:  There are programs that will check all links on a page faster.   You can use a bookmarklet to validate a page:  validate: HTML at w3.org.  Despite it's slow speed this is the easiest way to check a page, especially big pages.  Other Extensions:  Link Evaluator (44 KB) appears to color links in same manner and create some kind of results display as well.
Linkification ♦ 1.3.6
(66KB)		 John Hansen View plain-text URLs and e-mail addresses as actual links [ Plain-text URL Test Cases]
 This is a plain-text url for Test Cases:  http://www.beggarchooser.com/firefox/testcases.txt
 Notes & Options:  You can toggle this extension on or off by using Ctrl+Shift+Y [Ctrl+Shift+L] and then to see the effect you must use F5 (Reset/Reload).  There is a default limit of 15000 characters,which I increased to 115000 characters to see the effect on this page (107 KB).  Don't know how to find how many characters are used.  I use the option to require a double-click on a text link, so that I see page exactly as presented. [needs a documentation page!!!]  alternatives: URL Link, and Text Link [a]
LinkVisitor 3

(Fx2 vers)

3.3
(19KB)		Kevin Milburn
(kinitawowi)
Mark Selected Links as VisitedCtrl+F3
Mark Selected Links as Unvisited Alt+F3
Mark All Links as VisitedCtrl+F2
Mark All Links as UnvisitedAlt+F2
Always Mark Bookmarks as Visited 
Mark all or selected links as visited or unvisited... [view menu] [Context menu][Tools menu][Options] Can be removal from bloated Context menu with Menu Editor, in favor of just using the View menu choices.  The following bookmarklet may be of interest
red: Visited links to RED for visibility (suggested keyword of "red:") will mark visited links in Red, as some sites use same color for all links.
Linky ♦ * 2.7.1
(32KB)		 Henrik Gemal (documentation) lets you open all or selected links or text links into multiple tabs (|windows); or all images or image links as images into one|multiple tabs(|windows).  You can select specific links from among all links or those in your selection area.  Also can Validate|Download links. [options] [context] Linky ▶ "Open Selected Links in Tabs".  Provides count of links on a page, but no separate count of a selection.  Tab Counter extension would let you see how many links are open before/after using Linky.
List All Images 0.6
(10KB)		DonGatoShows image, url, size and dimension properties for all images of a page. (no CSS images). [context].  Also available inWeb Developer (images, view image information), summary of size in Page Info (Tools, Page info).
ListZilla
(redundant/obsolete)		 0.8
(16KB)		 Eric Hamiter
Neil Phillips		 Outputs either a plain text, VB code, or HTML file that lists all installed themes or extensions (/\) (#).  When showing a Listzilla list, it would be helpful to others if you also include the date when run, the version of Firefox, and the, and the operating system and version.  [Tools]   an alternative listing is InfoLister
Locate in Bookmarkfolders (♦ not for Fx3) 0.2.5
(14KB)		Alex Muntean Adds Locate to the Bookmarks Manager (Ctrl+B) context menu so you can tell what “folder” your selected bookmark is in. [context menu of Bookmark Manager]
Firefox 3 users should switch to Go Parent Folder
Location Bar Autocomplete(built-in) can be limited to bookmarks by prefixing with an asterisk ("*") and a space, and likewise for history ("^"), tags ("+" ) and also for limiting to title ("#") and limiting to url ("@").
Location Navigator 0.6.2
(46KB)		 Richard Klein (100) Location Navigator is an extension that lets you grab a location, select a portion of the location that varies, and then navigate up or down from that starting spot with a specified increment. You can define where the next url is to be located (compare to Next URL). [Go History menu]  Also see NextPlease, which looks for a “Next” link; also see PageZipper (external bookmarklet).
Longdesc 0.6 (4KB)Patrick H. Lauke Adds "View Image Longdesc: ..." to the image context menu, when this accessibility attribute is used.  [context]
Long URL Please   (not installed)0.4.1 (8 KB)Darragh CurranReplaces short urls with the originals so you can see where links actually link to. See hidden dangers using shorturls on Twitter (LifeHacker, video)
Lori
(uninstalled) 		 20051225 Hung Le  # track how long it takes to see the first byte from remote server (time-to-first-byte (TTFB)),  # track how long it takes to complete displaying the page (time-to-completion (TTC),  
1s 81ms 4s 396ms175.40 KB2/4 req
# track the page size,  # track number of sub-requests used to build the page.  [StatusBar] Suffers from same problem of all status bar reports -- uses too much real estate.
Manage Folders ♦ 1.0
(5KB)		Chad McHenry Places a "Manage Folder" item on the context menu of bookmark folders, which opens the "Places Organizer," expanded to that folder. [context of bookmark folder].  Useful companion:  Sort Places
McAfee Site Advisor ♦ *

(Not for dial-up users) (not currently installed)

 26.6
(guess 38KB)		[download]

(Not recommended for dial-up users, but can be enabled/disabled at status bar)

 Displays site security alert as green/yellow/red, red indicates serious issues.  Biggest surprise -- it McAfee SiteAdvisor breaks barrier in hogging status bar [G] [G] [G] [G] actually puts the site rating on the links within a Google search so you can steer clear of unsafe sites.  [ref] [Statusbar HOG] (does not give filesize but installed it is 569KB in folders) Similar: WOT (1,073 kb, yipes!))
Firefox version 3 includes some site checking. SA is nice because it is seen on Google web search, but it does slow down searching and only seen on first group of hits.
Fx3 beta problem: causes "bookmark this page" (Ctrl+D) to fail working now in Minefield 20080329.
Measure It (uninstalled) 0.3.8 (17.9KB)Kevin A. Freitas *mm*Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.  Uninstalled, due to status bar bloat, and seldom used.
Media Player Connectivity 0.9.1
(137KB)		Sethnakhtlaunch embed video of website in an external application with a simple click ...  Also consider alternative Tool, Options, Application.
MetaTags
(disabled) 		2.3.5.2
(59kb)		Victor PortonSidebar displays page meta-information (metatags, links, etc.) Has automated search engine submission menu. [Sidebar]Probably not very useful but does provide a link to stylesheets (PageInfo alternatives do not link to listed stylesheets)
Microsoft.NET Framework Assistant, 1.0, installed by dot net.  (I need it for an application, YUMV)
MiniFirefox
(uninstalled)		1.2.2
(5KB)		Kilian Cirera Sant [brokenlink] Hides menu bar, and all but a modified navigation bar combined with menus.  Use (upsidedown) arrow buttons to switch back.  Pretty close to a "Full Window" but not as good as AutoHide is for "Full Screen".  Unfortunately even disabling the extension will not return your original customizations.  Want my customizations in normal view; therefore, uninstalled.
Minimap (examination)0.3.8
(232KB)		Tony Farndon (Tones)gives you a suite of in-built maps and mapping tools for your web browser. Create and save a sidebar map using the addresses or address links you find on web pages (highlight then drag and drop), or by manually adding locations. View traffic Info, drag and drop or manually add kml file links, local search, directions, and view in google earth option. [Sidebar] Help
Mouse Gestures (disabled), The Optimoz Team, Allows you to execute common commands using mouse gestures.
MouseZoom ♦ 0.4.5
(12KB)		Konstantin Meyer Zoom all text and images on page with the mouse.  Hold the right mouse button and turn the mouse wheel to zoom in/out. Hold the right mouse button and click left to reset to normal font size. [Options].  Compatible with Firefox's own text zoom (Ctrl+0, Ctrl++, Ctrl+-) controls. [options] Displays zoom level when changing.  Fx2: Zooming images as in Opera is an option.  [|mouse zoom image|] Fx3: uses your View, Zoom, {text | text-only} option in Firefox, but adds additional mouse functionality. (see zoom thing).  Warning get rid of status bar icon with "Organize Status Bar" or other means, this extension assumes use of middle-click to hide/restore toolbars and removal of icon prevents you from getting into trouble.
MozBackup (not installed)(819KB never used)Pavel CvrcekBackup tool for Firefox and Thunderbird (etc) profiles.  Also see FEBE specifically to bundle up chosen extensions.  I use Windows batch files with XCOPY to backup all my data files.)>
mozimage (not installed) 1.0.0 Luca Minuti an image viewer for the Mozilla Platform.   [Tools]
Mr Tech Toolkit,
(not recommended)		(formerly Mr Tech Local Install) Go over the list of extensions that it replaces, and which you would choose to have, if you choose three extensions, you would certainly be better off installing those as more robust extensions, rather than one bloated extension, or anybody else's choice of a collection of extensions wrapped into one package.
Multiple Tab Handler
(installed, problems resolved)		0.4. 2009073101
(23 30 48 KB)		 SHIMODA Hiroshi provides features to handle multiple tabs (via ctrl+click, shift+click) at once.  [Options] are confusing, [Tab Context]: "Copy URIs of All Tabs", "Copy URIs" (of selected), "Duplicate Tab", "Close All Tabs", "Close Left Tabs", "Close Right Tabs", "Copy URL" and "Close Slimilar Tabs" (same URL).  And when multiple tabs are selected with ctrl+click on tab has the entire context menus: "Reload Selected Tabs", "Bookmark Select Tabs to New Folder", "Duplicate Selected Tabs", "Move to New Window", "Close Selected Tabs", and "Copy URIs of Selected Tabs".
Recommended companion:  Tab Clicking Options to close a tab with double-click. [MORE information]
MultiSidebar
  (disabled)		0.2.1
(12KB)		Josep del Rio Use multiple sidebars simultaneously. To use, right click on a menu item in the sidebar menu, or right click on the sidebar header. Split Browser
MyBookmarks 0.5.7
(48KB)		ma2ten Creates a formatted page from bookmarks.  Type the URI "about:mybookmarks" in the Location bar, then the page is displayed in a new tab. Also in Bookmarks menu as "about:mybookmarks".
myurlbar
[dumped]		  2005.12.14 lev (8960) Similar to search in Manage Bookmarks, but finds string right at the location bar from among your bookmarks and history.  Too distracting and speed issues more info ►
Nearby
(not installed)		 0.6 Neil Phillips Shows you Flickr photos, provides GeoURL links nearby when the link you are viewing has [(:)] [( )] Geographical META data.  Related: How to GPS tag photos (test on Neil's site] [StatusBar]
New Tab Button
(Mandatory for Fx3.5)		1.0.8
(32.2KB)		Cat thief[new tab]Restores New Tab Button into Firefox 3.1 divorced from shitty positions on tabs bar.  Mozilla seems hellbent on ruining Firefox at all costs, this is a LARGE extension.  To install drag .xpi link to extensions list.
See http://www.tom-cat.com/mozilla/updatenews/newtab-retired-06-19-09.html
/* Hide the tab container's New Tab button */ .tabs-newtab-button { display: none !important; }
Next Page:  There are several extensions and bookmarks that will obtain the next page or next image.  AutoPager,  Customize Google,  Fast Forward,  Next Image,  Next Please,  Page Zipper,  PN-Buttons :: Add-ons for Firefox,  PrevNextArrows,  repagination,  Rewind/Fastforward Buttons,  SmartPager,  (TidyRead) — Some extensions that create or use a layout:  DownThemAll,  FlashGot,  Linky,  Video Surf.
Next Please ♦ 0.6.6
(37KB)		 Howie Wang
Command -- Default Shortcut
Next Page -- Ctrl + Shift + Right Arrow
Prev Page -- Ctrl + Shift + Left Arrow
First Page -- Ctrl + Shift + Up Arrow
Last Page -- Ctrl + Shift + Down Arrow
analyzes the web page and tries to determine which links will take you to the next/previous/first/last web page.  customizable. Keyboard shortcuts advantageous over similar extensions (don't want or use toolbar buttons)   [test]
Nightly Tester Tools ♦ 2.0.2
(55KB) (25KB, old)		Dave Townsend
(Mossop)		Force compatibility, place FF build information into clipboard/titlebar.  Lets you take a screenshot of any open window and save it as an image, copy it to the clipboard or submit it to Imageshack.  [Tools submenu](also see disabled)
Severe weather warning!  Nightly Tester Tools 2.0 tries to take over compatibility, reply NO to retain documented versioning, or lose forever this vital information as related in addons list (read comments 2008-04-24 in author's page).
After a browser update, NTT will "disable" a lot of extensions, even though you have extensions.checkCompatibility set to False, since you would not want to lose the exclamation warning to re-enable extension, you can get things back to normal by disabling NTT, restart Firefox, see your extensions are back, and then re-enable NTT.  I could probably do with just the Title bar information and do away with everything else just to do away with the disabling nonsense.
For a extension with lower impact and which is much smaller see "Titlebar Tweaks.
No-Referrer [new]1.3.1 (3KB)Doropen a link in a new tab, without sending the referrer... [context] as "Open Link in New Tab Without R..."
No Squint (not&tried)1.0.1
(30KB)		Jason Tackaberryallows you to adjust the default text zoom level, and optionally remembers the level per site.  Haven't tried it, but seems to fit what some people ask for.  Also see Bug: 46415 and zoom things.
Old Add Bookmark Behavior (uninstalled)1.9
(6KB)		Alice White makes "Bookmark This Page", "Bookmark This Tab" and "Bookmark All Tabs.." behavior equal with Firefox2. (fixes bugs 450437, 451581, 451586) more info ►
oldbar ♦
(*single lines* with all of the information is a lot more readable)		1.2
(2KB)		sspitzermakes the location (URL) bar look like Fx2, but same symbols and algorithms of Fx3 AwesomeBar. // where to set number of items// [Bug 467067, 417692]
OpenBook ♦ (disabled, see style 9029) 2.0.1.1
(9 / 17KB)(7KB)		chuonthiscustomization of the Add Bookmark (Ctrl+D) dialog.  [Options].  Including Description in Options automatically fills in Description, also see Bookmarks properties.  Bookmarkers who use keywords would be lost without this extension.
Alternative:  User Style Keyword addition for Add/Change Bookmark (Fx3)
Edit bookmark caution ►
OpenDownload
(uninstalled)		 1.0.0 (16KB)Jeremy Gillick open any file from the internet into the OS assigned program.  This is similar to IE's 'Open' or 'Run' file download functionality.  NOTE: This does not support streaming.  How it works, is it downloads the file to your temp directory then launches it.  Your operating system will then choose the default application to run it with.  After 24 hours the file will automatically be deleted from your system. [BY WHAT MEANS?].  The dialog box looks almost same as PDF Download with an extra option.  – [_] Open with default Win32 application) [picture] Test opening Notepad (/\ v)   [use \windows\ in Vista instead of \winnt\] or other .exe fail, can be opened with a modified Launchy with it's Open button.
Open Long Url ♦ 0.2.3 (6KB) Jeremy Gillick [77] to open URLs that span several lines.  You can rework/edit within the dialog box. {File menu]
Open Profile Folder ♦ (serious users)1.3.2 (2kb 8KB) KyoOpen current profile folder in Windows File Manager [Tools].  (also see: Nightly Tester Tools).  Know which profile you are using and get to it immediately.
Starting in Firefox 3.6, you will have click-able access to your profile folder from the Help menu, via Help -> Troubleshooting Information or using about:support [Bug 367596] providing quick access to your profile folder at all times, including when in Safe Mode.
Opera_View (redundant) 0.11 (like IEView) Author not listed but indicates only that it is essentially same as the IE View.  [context menu] ‡ made redundant by Launchy, so not installed.
Operator
 
(looks interesting)		 0.6.2
(108KB)		 Michael Kaplycombine pieces of information on Web sites with applications in ways that are useful. For instance, Flickr + Google Maps, Upcoming.org + Google Calendar, Yahoo! Local + your address book, and many more possibilities and permutations.   [Mozilla Labs]  Screen scrapping.
OPML Support for Firefox
(disabled)		1.3 (18KB)Christopher Finkeadds OPML import/export functionality to the Firefox Bookmarks manager.  OPML is a file type that is widely used to distribute lists of RSS/newsfeeds.
Organize Status Bar
(enabled when needed)		0.6.3
(24KB)		y5
(John Hansen)		rearrange/remove status bar icons.  Can use to identify the names of status bar items and use the Stylish extension and then disable this one.  [options] [picture]
PageDiff ♦

(source/text compares, my Infolister listings are formatted at end specifically to compare different profiles)

1.4 (10KB)Khadir Abdul page compare application.  Right click on old version and select "Start DIFF" from the context menu, then select the new page and select "Show DIFF" from the context menu.  [context].  Essentially comparing text within the source (not comparing tags) but you see half width screen of source for each version.  If .js extension for example does not appear in Firefox then right-click on the file, then open in Firefox.  If comparing to an archive.org version all URLs will appear to be changed.  [context: "Start DIFF", "Show DIFF"].  Comparisons when not in Firefox:  Use Google Docs To Compare Two Text Files Online.  You can compare text pasted into a before and after text areas online with Quick Diff Online Tool, an Online Tool to do a 'quick and dirty' diff of two text or code fragments.
Page Info (built-in to Tools menu) various extensions (used to) add tabs to this:  All-in-One Sidebar, JSView (tabs, scripts(.js), stylesheets(.css)), Named Anchors, View Cookies, View Dependencies.  [Tools][Context] .  General | Forms | Links  | Media | Cookies | Security  See Link and Form Info or Page Inform Forms and Links to add these tabs back into Fx3. 
PageZipper (version)
(49KB external)		(author)PageZipper is a free bookmarklet which automatically merges all the "Next" pages into one, so you can skip directly to the stuff you want.  Also available as an extension (33KB) so your data stays on your machine. (also see AutoPage, and similar next page extensions and bookmarks)
PDF Download
 (not needed ▽)		 0.7.4
(110KB)		 Denis Remondini Click on link shows size and you then choose: Download it, Open in a new tab, View as HTML in a new tab (single column, no images), or Cancel.  [PDF examples: ACGNJ] alt May2005] How To Use:  Options, don't display popup, use OS (as defined in systems File Types).  (also see pdf notes)   22KB [context menu]
Apparently needed even with Firefox internal settings: Tool,Options,Downloads, View and Edit Options(button), for PDF set to Adobe Acrobat. [More info: FAQ, MzineKB]
This extension is NOT needed after all, but you do have to watch your options whenever Firefox is updated.  (also see OpenDownload (16KB), which does better with less overhead.)
People Search and Public Record Toolbar (uninstalled)1.0
(33KB)		Skip Trace People search and public record toolbar menu for Firefox, alternative to bookmarks and links on it's website. (many are revenue generating affiliate program links) [View Toolbars]
PermaTabs Mod ♦ [Fx3] (experimental)

 

Experimental extensions are purposely NOT found by Firefox updating [Bug xxx].
 
 
(Something similar can be done with a bookmarklet)

1.9.2 exp.
(48KB)		thomas haberzettl
(deos)

For Fx2 use older
PermaTabs 1.8.5.3 (12KB) [Fx2] by David Morrison

turn tabs of your choice into permanent tabs(Alt+P).  PermaTabs can't be closed accidentally, remain locked between sessions, and by default force links within to open in a new tab.  Perfect for doing a links check.  Can be optioned to be like Opera's Lock Tab.  [options] [tab context].  Reload (F5), Back, Forward, and bookmarklets work okay.  /jpg/ Appears to be available only for the first instance (Window) of Firefox in the system status bar.  My userChrome changes had prevented me from seeing tab color changed to yellow -- so was only apparent in tab context menu, but if you use my userstyle 9023 you avoid conflicts with coloring of Flat tabs.  While tab is protected cannot use bookmarklet (href:) within tab;  Usage Examples:  Protect page while checking out links with Checky extension, protecting a page while listening to a podcast.
Did not work and menus were not seen when Menu Editor was enabled, although they did work together on another fx 3.0.8 profile.  With both enabled these steps may or may not be complete but both are working now. Rebuilt localstore.rdf (reduced from 61.8KB to 7KB, but no change), dragged toolbar button to toolbar and clicked, works, turned grouped options of ext back off in Menu Editor, removed toolbar button from toolbars. Still working together. Seems the single context option only works for a session, only the context folder like option carries into another session.
PicLens
(uninstalled)		1.5.15
(555KB) Untested		(author)PicLens provides an immersive full-screen experience for viewing photos on the Web. PicLens can be used on Flickr, Facebook, Friendster, Picasa, and image search results from Google and Yahoo, and any page that supports Media RSS.  Disabled because not using possible problems with mouse zoom on Google Maps.
Platypus ♦ 0.81
(67KB 224KB)		 Scott R.  Turner Lets you modify a Web page from your browser -- "What You See Is What You Get" -- and then save those changes as a Greasemonkey script so that they'll be repeated the next time you visit the page.

Once installed, please read the Platypus help page [chrome://platypus/content/help.htm], or hit the '?' key after starting Platypus, if you are confused about what Platypus does or how it works.  This 404 page is a good page to test with (or this more extreme example of bad layout).  Start from context menu, use Ctrl+X (Cut) to remove portions, use I (Isolate) to isolate and keep only what is selected, use P for Page background removals, use S (Style) to modify font, use R (Relax) to remove width restrictions, and finally Ctrl+S to save in Greasemonkey (you will then have to use the pop-up or tab to install the script). Went from 67KB to 209KB download for what is marked as "minor" changes for Fx3 usage, and still no undo.

These notes continue on another page (platypus.htm)

preferential
(not recommended, needs improvement)		0.8.1
(85KB)		 Stephen Bounds GUI interface to some of the about:config variables in your configuration.  Seems to be rather sparse, even considering extensions not included, and the tree structure of listing with [+] and indentations makes it hard to read.  Descriptions are too short. [Tools, Advanced Preferences]
Prefsearch ♦ ☹0.1
(8KB)		 Eric Hamiterresearch an about:config preference via Google. [context menu within about:config] Fx3.1b1pre, causes about:config to fail with: XML Parsing Error: undefined entity // Location: about:config // Line Number 45, Column 3: // -^
Professor X (uninstalled)0.5
(26KB)		Stuart Robertsonlet's you see contents of the page's head element, including Meta, Script and Style content without viewing the source code. [context].  May be helpful for those not familiar with HTML Meta Tags.
"Properties" or "Page Info" (context menu)Firefox
built-in		---Clicking on Properties of an image context menu will show both ALT= text and Title= text, no need for an extension to show both or to show ALT= if there is no Title= attribute.  You would need an extension to view or support longdesc=. More information on context menus (right-click menus).
QuickRestart ♦
(a necessity use Ctrl+Alt+R)		1.1.5 (11 34KB)Juan C. Avila /r/ Restart Firefox such as after enabling or disabling an extension, adds "Restart Firefox" to File menu has shortcut Ctrl+Alt+R (or Ctrl+Alt+F4).  Like restart from tools, addons when you install an extension.  Loss of shortcut may be fixed by keyconfig extension.
Quick Sum
scriptbusy! (disabled)		0.1 Ted Mielczarek sum up values on webpages, much like a similar feature found in Microsoft Excel, works well with the Ctrl+Click feature of Firefox that allows you to select multiple table cells  works nicely use of Ctrl+Shift+click seems to work better.  (bug 190515, 239223)
Quote Colors (not for Firefox), Malte Rücker, Configure text and background colors for different quote levels in mail/news messages.
QuoteURLText 1.0.8
(12KB)		Jay Palat Provides a single formatting option alternative to CopyURL+ for the technically challenged. Selection [Options/Tools} [Context] --
<a href="@url'>@title</a>, @quote (@date) -- would generate
<a href="https://addons.mozilla.org/firefox/4292'>QuoteURLText :: Firefox Add-ons</a>, Quote URL text will copy selected text to the clipboard including Page Title, Location and copy date. (Tue Aug 19 2008 10:35:50 GMT-0400 (Eastern Daylight Time))
Read Easily ♦

(Toggles page style ON/OFF)

1.0.3
(7KB)		 Aliaksandr Radzivanovich
* *
Adds a toolbar button (toggles) and Ctrl+Shift+Z to make hard to read sites readable by removing gaudy CSS usage, as a faster alternative to using View menu, Web Developer, or bookmarklets.  Both Firefox and Opera have built-in simplified style choices and user customization of styles under the Style Menu.  The toggling of icon lets you see if extension is invoked or not.
Red Hand Cursor   Style for Stylish extension. J=Java, N=New, PDF, ... test “files”. Target="_blank" appears to take precedence over PDF
Redirect Remover ♦ 2.5.5
(32 39KB)		 xeen
(mozdev.org) ♦		 /on/ /off/ Redirect Remover detects relinking URLs like http://www.url.com/redirect.php?i=54&url=http://www.mozilla.org and directly links to the desired target: http://www.mozilla.org   In most cases they are used for adding a frame like "go back to page xyz" or to spy the user's clicks; however, there are some useful services using the same method: E.g. the Babelfish translation service.  Use the whitelist to exempt those links from cleaning.  When enabled () at the status bar removed redirects show up as a modified cursor and with a "RDR:" prefix on the url as seen on the status bar.  [Options][Properties (enhanced)] (screenshots) (try test page and testing links)  Suggest showing the icon in the status bar via options.  The send email at the bottom of this page will not work when this extension is active, unless overridden in whitelist options, also should exempt archive.org, and if you include (embed) bookmarklets in your HTML check such usage on your pages:
  mailto:* -- expected to be handled by ver. 2.5.1 internally
  http://*.archive.org/*
  http://login.yahoo.com/*
  http://geocities.yahoo.com/*
  http://www.alexa.com/*
This addon has in the options a button to "Add Default Filters", suggest you use it, includes one for yahoo.
  http://*.rd.yahoo.*/my/login/drawbridge/signin/
RefControl (of interest)0.8.11 (33KB)James Abbatiello Control what gets sent as the HTTP Referer on a per-site basis. (of interest, but not installed)
Regular Expressions Tester * 1.1.6.12
(24 48KB)		Sebastian ZartnerTesting Tool for regular expressions with color highlighting [Tools] — see these: Design215 Toolbox, and in Excel ...
Remove Cookie(s) for Site, 0.52, Dwipal Desai, Adds right-click menu option and toolbar button to remove all the cookies of currently opened site.
repagination ♦ 2006.4.5
(6KB)		Lev See more search results etc. on one page, concatenating several pages together. Right-click on a "Next" link, select Re-Pagination, All. Or select Re-pagination, Limited and the number of pages to append. Brings to other results pages a nice feature taht was added to the Customize Google extension.  For Photos select Slideshow and duration in seconds.  [context]
Research Word 1.3.6
(3 19KB)		Scott A.) Quickly lookup a word or phrase simply from the Context Menu (or as keywords).  Search words with Wikipedia (wi), Google Definitions (gd), Google Images (gi), Urban Dictionary (ud), IMDb (im), etc.. [context](kw).
resize:  resizeable form fields (old),  Resizeable Textarea,  Text Area Resizer & Mover,  resize Window [Alt+SpaceBar], 
resizeable form fields (obsolete) 0.2.1 Raik Juergens *Resize textareas to your needs. (see Resizeable Textarea)
Resizeable Textarea 0.1d (4KB)Raik Juergensresize small textareas (author's own replacement of Resizeable Form Fields for Fx3)
retitler 0.2. 090310
(38KB)		!=changes the title of a website by applying user-settable rules on it.  Actually changes title picked up by other extensions.[Options]
Warning:  turn off tab minimum width in options settings which overrides browser.tabs.tabMinWidth and causes tabs to vary in size when only favicon should show and to scroll (see Tabs Bar Minimal Size (style 9043)).
RIP (Remove it Permanently)
(uninstall ed)		 1.0.6 (fails)(team)appears to have problems with performance, cursor, selection, and lack of control over what is to be removed doesn't look like an alternative to Playtypus
Sage (disable not my thing) 1.4.2 (168KB) Jerome O. FlahertySage is a lightweight RSS and Atom feed reader extension for   [rss]  RSS   XML   Mozilla Firefox invoked from [tools} or with Alt+S.  In Fx2 remove the History menu with Menu Editor to regain the Sage shortcut.
Save As Image
(not installed)		 1.044
(12KB)		Rowan Lewis Adds the ability to save a page, frame, or part of either as an image.  Useful for showing people bugs in a website, creating a snapshot of design progress, or perhaps even creating a gallery of websites.  Cannot capture toolbars or flash.  also see imagebot and Screengrab.
Save Complete 1.0.1
(27KB)		warhammerkidAs more and more sites use CSS, Firefox's built-in complete save becomes increasingly less effective, as it doesn't support stylesheets. This extension fixes this, and saves the complete page, including all images and all stylesheets associated with the document, even imported stylesheets and images referenced in the stylesheet files.  related: Screengrab
ScrapBook
(uninstalled)

for replacement see ... ScrapBook+

 0.22.12 Gomita Helps you to save Web pages and easily manage collections. Key features are lightness, speed, accuracy and multi-language support.  Major features are: Save Web page; Save snippet of Web page; Save linked Web page; Organize the collection in the same way as Bookmarks tree; Full text search and quick filtering search of the collection; Editing of the collected Web page; Text/HTML edit feature resembling Opera's Notes.  actually not into this kind of thing and used up 286MB in profile.
Screengrab 0.96.1
(44 82KB)		Andy M Screengrab saves entire webpages as images.  It will save what you can see in the window, the entire page, just a selection, a particular frame... basically it saves webpages as images. Defaults use of Mozilla Canvas, and PHP (vs. JPG). [Options] [Context][Status Bar]  related: Save Complete
Scroll Bars ♦ userChrome
modification		(author)No extension needed, scroll bars can be added with code added to userChrome (see Editing Configuration Files) to add scroll bars to [Menu] [Context] [Bookmarks] (height 600px).  See my complete userChrome.css code. (archived versions: [Menu] [Context] [Bookmarks]) [picture] See userstyles 52 (or 54 & 56) - but is failing in Fx 3.0.5 leaving frozen bookmark menus working again in 3.0.9 and 3.0.10.
searchcache

(compatibility)

 2005.11.28383 Search for previously visited pages using words in the page rather than the address or titles.  Since it is on a sidebar it will not be wasting resources except when invoked, it is slow though, but not otherwise available. [view-sidebar]
Fx2 appears to slow down things (Not Responding) errors
Fx3 beta problem: causes "bookmark this page" (Ctrl+D) to fail.
searchsidebar project1.2
(15KB)		( mozdev project)At the moment the search sidebar is being re-written from scratch to take advantage of improvements to search in Fx2. Only basic search is enabled for the time being. [Alt+K] [View,sidebar]
S­E­O for Firefox
(uninstalled)		2.2.1(seobook)
[SEO Firefox]
[SEO Firefox (off)
 Check Google search results for rank, placements (Search Engine Ordering tool).  [Options][Statusbar] Don't use all the time, it wastes public bandwidth and your search response time, keep it disabled at the statusbar.  Also noted at site that it may interfere with Customize Google ext.
Server Spy (disabled)0.1.3 (10KB)Christophe Jacquetindicates what brand of HTTP server (e.g. Apache, IIS, etc.) runs on the visited sites. [statusbar]
Session Manager
built-in Fx2
(reopen window, added)		0.6.4.6
(237 KB)		Michael Kraft
(Morac)		Requires about:config "browser.sessionstore.enabled" set to True.  Session Manager saves and restores the state of all windows - either when you want it or automatically at startup and after crashes. Additionally it offers you to reopen (accidentally) closed windows and tabs. [options]  Note:  Features targeted for built-in in Fx3.5 see Bug 394759.  As far as reopening accidentally closed window goes for myself, so rare that I'd just go for the History sidebar or library rather than extension overhead, as the built-in features work for me.
Shazou [new]
(uninstalled)		1.1 (3KB)Chuck Durhamone-click to map and geo-locate any website in current view, includes a WhoIS. [context] Wierd interface to Google Maps with location tag which disappears on ±zoom.  Have no use whatsoever for the Status bar icon, it is already in the context menu (will uninstall).
ShortcutKey2URL 1.1
(24KB)		 Open URL with the shortcut key.  [Ctrl+Q], unfortunately does not work well with Firefox 3.5.  Similar: SiteLauncher (357KB)
Show Anchors (purpose?) 1.14 PCDingo Shows an anchor symbol and highlights anchor text.  Lacks clear documentation and purpose, so uninstalled   more info ►
Show Image
(disabled)"		 0.4.1 Cheng Khoon Adds context menu entry to reload a selected image that failed to show on page.   [context menu]
ShowIP 0.8.16
(13 24KB)		Jan Dittmer Show the IP address of the current page in the status bar.  It also allows querying
63.245.209.31
custom services by IP (right mouse button) and Hostname (left mouse button), like whois, netcraft.  Additionally you can copy the IP address to the clipboard.
Show keywordsCan't use customization:  loss of icons within Customiation while extension is active, can also cause lose of menus after starting customization.  (misnamed actually tags not keywords, no interest except as a problem).
Show Parent Folder ♦ 1.4
(5KB)		Alice WhiteShow Parent Folder adds a column to list view of Library (Organize Bookmarks), especially useful if view is of search results.  Must add column through View menu (or context menu of column headers).  Reorder columns by dragging.  [Option] [forum].  Columns Ordered by dragging headers, mine are: Name, Keyword, Location, Parent Folder, Visit Date*, Description*, Tags*, Added date* (* very narrow columns).  Useful companion: Go Parent Folder.
Site Inspector
(unistalled)		 4.1.0.724(Pressler) uses sidebar, basically same as Web Developer.  Works with FF but is mainly of use to IE.  The online tools portion can also be done with Keyword shortcuts from a url or bookmarklets in either FF or IE.
Smart Middle ClickFor those that use middle-click on links this fixes JavaScript problem that opens an empty tab instead. click here test of a JavaScript link that normally opens in same tab. (not installed does not override my system default for ENTER)
SmartSearch 3.10
(24KB)		Ben Goodger, Chris PovirkSearch for the word under your cursor or the selected text through your context menu, using any of your bookmark keywords. (context (related Context Search)
Sort Bookmarks written by Torisugari is maintained by David Lechnyr and was renamed to Bookmark Sorting, but you need to use SortPlaces for FF3.
Sort Bookmarks Menu (never worked for me)3.3
(12KB)		Alice Whiteadds menu in the Bookmarks Menu to Sort by name|title|visitcount etc by context menu within Bookmarks menu. Options for folders at top, or inline (none), whether to sort Bookmarkks toolbar.. (see SortPlaces)
SortPlaces ♦ (Fx3 Bookmarks sorting)

(ver 1.6.4 fixes a lot of problems with structure & with Xmarks)

1.6.4
(49KB)

(use 1.6.4 or better)

Andy Halford Sorts your bookmarks in a variety of ways.  [Options], adds a new item in Bookmarks Menu ("Sort Bookmarks") which is where you invoke the sort.  The sort affects Bookmarks (in sidebar, Ctrl+B) and Library list (Organize Bookmarks, Ctrl+Shift+B), and is what [places|Sort Bookmarks] we all look for as recursive sorting through folders, and even has an option to automatically resort a changed bookmark folder.  Very fast (1 sec.).  Useful companion:  Manage Folders.  You will want to change [option] to case-insenstive sorting, and to remove sort icon from status bar.
Suggest you do not have SortPlaces invoke sort automatically via it's options, use the statusbar or toolbar button, or bookmarks menu instead to sort.
SortPlaces or built-in sort will result in destroyed bookmarks and folders if you have BookmarkDD installed -- uninstall BookmarkDD immediately whether or not you install SortPlaces.
Past problem in Minefield 3.2a1pre messes up tab bar, status bar, and places "tooltips" to right of squashed bar (fixed in Firefox).
SpellCheck ♦ 0.3 (10KB) LaGoderre uses Firefox's spelling checker to check the spelling of the entire web page, requires the language of the page to be specified using the lang attribute on the html tag. [Edit Menu]. Also see a spelling check bookmarklet bookmarklet given a keyword shortcut of “spellcheck:”.
Split Browser 0.6. 2009050101
(28KB 109 KB)		 SHIMODA Hiroshi Splits the content area of the browser window Top|Bottom |Left|Right by dragging a link to the edge of any frame or via context menu.  Tabs bar remains with the original frame, other frames get their own location bars.  [context][tools][tab][options].  more info ►
SQLite Manager
(disabled, should try to learn)		0.5.6.1
(139 KB)		Mrinal Kant Manage any SQLite database on your computer such as Bookmarks, History.  [Options]  [Tools]  Warning: more info ►
Stylish
 
(see warning)
Amazing that a very knowledgeable developer has a great extension but redid it with a very BAD (useless) user interface and doesn't back it out for his users despite loads of complaints.
 
How to suppress updates for one extension. 		0.5.9 (170KB)
[good interface]

1.0.7 (136KB)
[bad interface]
with ver 1.*.*
you must install
Stylish Custom
in order to regain
features lost in vers 1.*.*

Jason Barnabe (np)

userstyles.org

 Customize the look of the application and of websites with Stylish, a user styles manager.  Last chance resort to make Firefox 3 appearance usable, if can find/retain decent Back/Forward, New Tab icons.  Stylish is to CSS what Greasemonkey is to JavaScript, and unlike other methods of using user styles, most styles take effect immediately.  [Options][Help] [discussion]. (Styles I wrote and the styles I use)
Warning:  Do not install versions 1.0.*, the important thing is to be able to install styles. Version 1.0 is a disappointment, it jumps the shark, has a very bad user interface. Hopefully an update someday will put it back see discussion [2700].  Lost ability to add !important, lost ability to use a color picker to change/insert color.  Syntax checking is probably impaired. Illogical placements of buttons. Loss of checkmarks to show style is ON/OFF, which is replaced by a style that shows half as many styles in the same space with horrible new stylish icon, horizontal bar, and bold/normal text, and loss of columns which also had standard sortable conventions on the column headers themselves.  Where 33 styles could be displayed now only 15 can be seen, so what took 2 views now requires 5 views to see styles.  If I have to go kicking and screaming to version 1.0.x then I would install Stylish - Manage Window beautified (style 17571) which is tacky but at least shows one more column than 1.0 by itself.  Another extension to fix an extension by the one person who praised the Stylish 1.0, adds stuff back but has lost the quick interface and simple style of the original -- Stylish-Custom (addon 12105).  Also see style 17866, style 17975 -- none of the extensions alone or altogether can put Stylish back together again.  Be sure to change extensions.stylish.manageView to 1 instead of 0 so it doesn't mess up view of addons.
Stylish-Custom 0.5.9
(64KB)		ChoGGiunofficial extension to Stylish, restores the !important button, Color/Site Rules menuitems, enable/update checks, use of an external editor. (Feature requests) [options].  You must install Stylish 1.* for Firefox 3.6 (Namoroka) so this is a must for then.
Tab ...

      (#tabs)

More information on Tab usage see ► Tabbed Browsing in Firefox
Extensions that affect appearance of tabs:  retitler; and Styles:  Tabs Bar Minimal Size (9043), Tab Color Underscoring active/read/unread (9023).
Extensions that can copy url and title to clipboard from active or open tab(s):  CopyURLplus,  Copy All urls,  Multiple Tab Handler,  QuoteURLText
TabAway (forget it)(version)
(3 KB)		 kse tmp Close the previously selected tab by double-clicking on the active tab (ridiculous).  (Test)
Tab Clicking Options ♦ 0.6.9
(29KB)		Twanno Select actions for various clicking events on a tab or the tab... Large extension since I only need/want close a tab with double-click [options] but this one works with Multiple Tab Handler.
Tab Counter ♦1.8.4 (23KB)MoracCounts the number of open tabs per window and displays the count in the toolbar. [Options].
Tab History to Tabs (placeholder)...Twanno pictureCurrently see 3 items, waiting for a 4th item at mozdev.org - twanno [back/forward context menu] use Shift+ to not close active tab.  Create test histories with tab capacity files by opening several links in a tab then back off 1 or 2 tabs [ref].
Table2­Clipboard ♦

(Dafizilla Table2Clipboard)

1.2
(28KB)		Davide Ficano Firefox allows selecting rows and/or columns from a table with use of the Ctrl and left mouse button.  Now you can retain table features can can paste into Excel or OpenOffice, or CSV for plain text. [Option] [Edit menu] "Copy Selected Cells Ctrl+Shift+C";  [Context menu] "Select Table", "Copy Whole Table".  For sorting see “TableTools”.
TableTools ♦ 0.27
(155KB)		Mingyi Liusorts by column (ctrl+alt+click), filters (ctrl+shift+click) or copies any HTML table (ctrl+z+click)suitable for pasting into MS Excel.  Auto-detect or context based sorting/filtering for date/time stamps, numbers (including scientific notations), major currencies, IP addresses, or plain text. [context][options][shortcuts]  See demo page for the detailed feature list.  To copy a filtered list like in Excel use Context menu then "Other Table Operations" then "Copy Filtered Rows as Tab delimited". To copy a column from a table see “Table2Clipboard”. Inverted options also available but not documented.
Tab Mix Plus (TMP) (not recommended)Suggest using Firefox configuration preferences (about:config, also see extracted tabs config options) instead of this bloated problematic extension. Expect to have serious problems with every major Firefox update.  Check the author's homepage for a later version of TMP than available at addons.
Tab Saver!
(redundant, built-in)
(see Duplicate Tab)		 1.1.2
(85KB)		 Nikhil Sharma Restore tabs when last Firefox window was closed.  Use Restore Tabs on Tools menu, as Ctrl+Shift+T is already in use with Web Developer (Ctrl+Shift+T toggles Web Developer toolbar).  An alternative is Tab Mix Plus which is much larger.  [tools][Context] A session Manager is built-in to Firefox 2.0 and you can configure your tabs without TMP (see Tabs page).
tabsearch 0.3
(2KB)		Blasseyadds a search box to the "All tabs" pop up, which hides tabs whose titles do not match as you type.
Tab Sidebar
(removed)
1.0.3
(158KB)		 Dave MossepExpected tab titles in sidebar, instead got web page snapshots, and the shortcut key (ctrl+shift+T) has many conflicts.
Tab Slideshow
(uninstalled)		1.6 (9KB)
(compatibility)		Eric Searcy Cycles through tabs like a slideshow. (needs work)
Tabs Menu
(Needed for crappy Minefield (Firefox 3.6) interface		(version)
(xKB)		Mikel WardAdds a Tabs menu (ugh) to the main menu that lets you easily change between tabs. Needed for Minefield where "Quick Tabs" like in IE, replaces List-all-Tabs, bug: 463569
Tab ...end of tab and table related extensions, for More information on Tab usage see ► Tabbed Browsing in Firefox
TagSifter
(not my thing)		4.1.4
(127KB)		chiisai tsuSelect tags in the sidebar or menu, and see all the related tags and bookmarks. Or search your bookmarks with set operators, like "tag1 - (tag2 + !tag3)".  Support (If I used tags I'd be using this)
Talkback ♦
(probably disabled)		 2.0 mozilla.org Submit a crash report to Mozilla.org [used to be hard to avoid having this installed]
TestGen4Web
(disabled)		0.50.1.1
(69KB)		Vinay Srini Navigation recorder, and playback tool, you can generate HTTPUnit, PHP-SimpleTest scripts. [Toolbar] Step options include:  wait for x milliseconds, "goto" to enable looping, enable looping of the scripts at toolbar level. TO BE TESTED, also see iMacros
Text Area Resizer & Mover 1.80
(17KB)		NettiCatAllows to easily resize or even move textareas. (only resizes horiz not vertically) [context][2x]
Text Area Word Counter 1.2
(10KB)		Gina Trapanicounts total number of words not including HTML entered into all the text areas in a document.
TextMarker!
*
(uninstalled) 		0.3.2
(19KB)		Simon Shareef highlight text selections via keyboard (Ctrl+M {M|B|N} or context menu.  Copy all highlighted text to clipboard.  3 highlighter colours are available that can be customized. [context]. Will probably dump since only Ctrl+M would be wanted
Throbber Button ♦ 1.1 (26kb)RacerEnables four links of your choice by clicking on the throbber [Options].  Pipes can be used for multiple urls.  Bookmarklets can be used such as increment/decrement, keyword shortcuts cannot be used.
TidyRead
(looks interesting)		0.3.2
(200KB)		Matthew ChenIt intelligently extracts the core text of news articles and blog posts -- even multi-page ones.  TidyRead allows you to quickly grasp the main message of the page.  TidyRead automates the "next page". When scrolling near the end of the page, TidyRead detects and renders the next page, so you need not to click the next page anymore.  Has disability preferences for poor vision.[options] [tools] [status bar]
Titlebar Tweaks
(obsolete) 		!1.8.0
(1.6 KB)		Cosmic CatTweak your browser's titlebar text.  A small alternative that does require you to manually update information you want to show in title bar (i.e. Firefox 3.* "Personal01") compared to using the much larger Nightly Tester Tools.  For a test profile might also want to use along with Color Toolbars, Style 9514. (Main profiles continue to use Nightly Tester tools, but this is nice for some test profiles) 
Toggle Word Wrap ♦1.3 (9KB) Kaspar Brand Toggles word wrapping in PRE elements.  test page and text wrap in CSS3 pointed to by the author, and a test/notes page of my own.  [View (word wrap within <PRE>)][context]
To make wrapping of text permanent modify your chrome/userContent.css,
  pre {white-space:-moz-pre-wrap}
  pre {white-space:pre-wrap}
Alternative: use a style Wrap PRE text (http and https only) | userstyles.org (style 19596) if using the Stylish extension.
Bug 261081 - Add support for pre-wrap value of white-space, RESOLVED FIXED
Bug 433065 - remove support for pre-wrap, RESOLVED FIXED
Toolbar Buttons (version)
(xKB)		Michael Berkley pagecolors Set of 95 buttons for Firefox, 58 for Thunderbird, and 26 for Sunbird.  Suggest using Button Maker instead to choose individually from a list (same buttons/maker).
Toolbar Grippies
(compatibility) (uninstalled)		! 0.4.2
(7.3KB)		motemenAdds grippies to the toolbars.  Doesn't work properly with extensions which customize toolbars such as Toolbar Enhancements.  Right click on menu area to show/hide toolbars is cleaner and would allow you to reduce height of toolbars as well. Uninstalled, icons both active and stored too big and counter to making toolbars small.
Translate
(removed) 		 0.6.0.9 (33KB) Paul Grave This Extension was not updated and has Script Busy problems.  See gTranslate
Translator1.0.4.4
(72KB)		 Byron Adams[T/T]web translation extension that allows you to translate any web page into nearly any language at the click of a status bar button, right-click to select and invoke a translation.
TripleSelect
Uninstalled, messes up multi selection in Fx3		 !1.7 (8KB)
(compat­i­bil­ity)		 Harry Patsis (badlink) Triple click selects the whole paragraph as in IE, not just the current line. Works fine but double click was not selecting entire line before or after installing this addin.  For line double-click pause at down then 3rd click.  Impossible with my settings so think hold and 1 in 5 odds [3x-click] {probable alternative -- about:config browser.triple_click_selects_Paragraph} – also Ctrl+click seems to usually work.  Triple click is built-in to Fx3
Ubiquity (uninstalled)0.1.6
(185 581 KB)		Aza Raskin (Mozilla Labs)Compose gmail/email -- Lets you map and insert maps anywhere; translate on-page; search amazon, google, wikipedia, yahoo, youtube, etc.; digg and twitter; lookup and insert yelp review; get the weather; syntax highlight any code you find; and a lot more. Ubiquity “command list” to see them all.  Probably for TB and web mail.
Undo Close Tab (♦)
(now built-in) 		20051204
(author's site)   → 		Dorando
(documentation)		 Tabs can be reopened via tabbar context menu, browser context menu, middle click on the close button or tabbar, or by a shortcut (Ctrl+Shift+F12) Apparently will not undo close of first tab (grayed out) Note:  is updated for 1.5.0.2 but you must first uninstall then reinstall († ‡).  Undo Close Tab is built-in to Firefox 2.0 and later.
UnHide fields (uninstalled)0.2e
(14KB)		iDoview and edit hidden fields in forms... [context] ("Show Hidden Fields")
BUG:  JavaScript Application error on Fx3 startup: "There is no forms!" [disabled]
Unicode converter
(uninstalled)		2.098
(29KB 1,106KB)		Brett Zamir Converts entities from a selection, character references, etc. into Unicode and back, has Unicode lookup and charts, converts Hex/Dec. ref to unicode.org/charts site, also see my symbols page.  [options][tools] A bit frightening to see an extension become so large, nice and I guess for what it does it has to be large and is probably efficient, but I think I will keep it normally disabled, until needed.
URIid ▽

(not updated, uninstalled, shown only for documentation)

  0.0.8 Chris Neale (5)
       
       
Applies User Stylesheet (CSS) rules on a site-by-site basis via additions to UserContent.css – the following maintain visibility of visited links vs links when using Google.  (link, visited)
  a:visited {color:#CC0000;}
  body#www-google-com a:visited, .fl:visited{color: #CC0000 !important;}
  body#groups-beta-google-com a:visited, .fl:visited{color: #CC0000 !important;}
I don't think this is going to be updated for Firefox 1.5 and I don't see alternatives, except to force color of all visited links. Samples: #0000EE #0000EE,  #0000CC #0000CC link,  #CC0000 #CC0000 visited (REaD),  #FF33FF #FF33FF
There will never be a 1.5+-compatible URIid; @-moz-document rules do the same thing.  Examples of use and nesting of @-moz-document in Code (button) at userstyles.org
meanwhile forced to use this in userchrome.css -- don't like having to do this but can not tolerate Google overriding colors, making visited links indistinguishable from normal links on a laptop.  This override messes up a rather important bookmarklet for Internal/external coloration of links, and another userchrome.css cursor modification if link opened in a new window.
a:visited, .fl:visited {color:#CC0000 !important;}
UrlParams 2.2.0
(40KB)		Erik Schmidt Shows you the GET and POST parameters of the current website in the sidebar. You can alter their values, add new parameters, switch get/post and more. [Sidebar][Documentation]
User Agent  Switcher
(uninstalled)		 0.6.1?? Chris Pederick Some sites don't play fair.  Agent switch can pose as itself (firefox), IE6, Opera. Invoked from Tools.  warning:  Don't close Firefox with Agent Switcher invoked -- problem:  “Java Plug-in for Netscape Navigator should not ... Please use Java Plug-in for Microsoft IE instead” -- solution if done, go to prefs.js and remove all lines with Agent Switcher, bring up Firefox, tools, switcher, default.  Back to normal and agent switcher lines are back into prefs.js   references:  ref1-fragid# (problematic) [tools]
Video Download
(untested)		2.0 )
(2KB)		(author)allow you to download videos from the most popular video sharing sites (Google Video, Youtube) with only one right click and selecting the option Download Video. Have yet to try.  File must be playing and completely downloaded before invoking. [Context] 
Alternatives:  Fast Video Download (60KB) more specifically for YouTube
Video DownloadHelper
(Download Helper) (uninstalled)		4.2
(277 442 KB)		(mig) capture video and image files from many sites.  Icon gets animated when downloadable videos are detected, and a menu allows you to download files by simply clicking an item.  [button|context][Options] You can setup the extension to automatically convert the downloaded movies to your preferred video format. manual FAQ, support, KB, CTRL+SHIFT+click bypasses the File Saving dialog
VideoSurf Videos at a Glance 0.50
(82 KB)		VideoSurfGet visual video thumbnails on Google, Yahoo! & Youtube. See what a video is about before watching it and jump to specific moments in a video.  videosurf:
View Cookies 1.6
(12KB)		 Edwin Martin Show Cookies lets you see and destroy cookies on your computer.  Adds the Cookies tab to the built-in “View Page Info” accessible from the context menu, tools menu (Page Info), and web developer (information tab).  (To see all cookies in Firefox (built-in), Tools, options, privacy, view cookies.) [context: View Page Info (cookies tab)]
View Dependencies 0.3.3.0
(38 45KB)		Florian QUEZE adds a tab to the Page Info window, in which it lists all the files which were loaded to show the current page.  Sortable on image, stylesheet, script, size. [context,...] context to open files within.
View formatted source (format source)
(uninstalled)		0.9.5.0
(226 KB)		Felix RitterDisplays formatted and color-coded source and optional CSS information for each element.
View Rendered
Source (♦)
View Source Chart

(uninstalled)

 2.6.03
(29KB)		 Jennifer Madden Superb rendering with coloring and framed borders to distinguish HTML tokens, tables, lists, DIV, and Scripts showing their scope within the entire source content.  more info ► [View, tools/submenus, context]
fx3 doesn't work, tested on it's addons page-- There are always free bookmarklets that can be used.
View Selected
  (Tabs)
(not updated)
(uninstalled)		 0.1 Colin's Blog Just like it says on the context menu “View Selection in New Window”, make a selection, and you can see that selection characters/ words/ table/ frame in a new window.  There is also View Selection ♦ bookmarklet available (opens new window) that does same thing .
View Selection Source (built-in) (Firefox) View Selection Source is built-in to Firefox, allows you to view and copy specific source underlying a selection within a webpage.  This is a valued feature even for many non developers.  Dom Inspector makes this flaky in combination with Ctrl+U notepad userChrome.css modification.
ViewSourceWith
  [skip for now]		 0.0.8 Davide Ficano Extension that views the source with a program of your choice.  Can't get this to work, don't understand options, main editor of interest is Notepad, sticking with Launchy until this is documented (nothing in Google: viewsourcewith viewsource.xml notepad.exe), Messes up and confuses View menu
Web Developer
♦

Must be at 1.1.2 or higher or risk loss of data with Edit

 1.1.6 (181KB) Chris Pederick Adds a menu and a toolbar with various web developer tools.   22KB [context menu, optional toolbar] [F] [H] [h |  b ] [Q] [S] [T]   Many bookmarklet type items of interest to those who create web pages have already been incorporated and organized into Web Developer Features & Menus.  Use the author's site the other sites are way behind.    cat:developer  Display anchors #webdeveloper, Font information(Ctrl+Shift+F)   [Tools/submenu] Bugs *
Wikalong v0.82 (40KB)Project wikiWikalong A wiki-margin for the internet. Appears to be for anyone's comments. Embeds a wiki in the Sidebar of your browser, which corresponds to the current page you are viewing.  Using Wikalong
Word Count ♦ 0.4 Eric Hamiter Counts the number of words in selected text.    [context menu]   -- install from the author's site.  site has tutorials on creating Firefox extensions.  The Plus version uses too much space on the status bar check these out instead: Words: (count)
Work Offline ♦ 1.4
(24KB)		 Naoyuki Asano [online] [offline] Online/Offline indicator for status bar. (Firefox default icons)
 Alternative ambiguous snakelike icons can be substituted [offline] [online]
WOT 20090918
(726KB)		WOT ServicesWOT (Web of Trust), rates 21 million websites on risk/trust for online fraud, including phishing and spyware. WOT can add reputations also to web search results, Digg, Gmail, Wikipedia, and other selected sites green to go, yellow for caution and red to stop.  [support][forum][blog] -- Good page rendering, but is a large extension and the lookup slows Google searches especially for streamed search views and doesn't report on additional streamed pages.
XPather (not installed) 1.3 Viktor Zigo
[comments]		 Features rich XPath generator, editor, inspector, and simple extraction tool.  [Documentation] Need to read about this extension.
X-Ray
(compatibility)		0.7
(xKB)		Stuart Robertsondisplays the tags on a page without viewing the source code. display the documents tags, including class and ID names.[context][tools]
Zoom things
  (#zoom)		   See
► Auto Hide, Colorzilla, Image Zoom, Mouse Zoom, No Squint; 
► Help with Mouse Usage in Firefox and a more general mouse button settings especially for five buttons. 
► Also see more Firefox mouse zoom gems in a search at addons [simpleton search]. || Tests: [1] [2]
A complete Listing of Extensions actually in use, is created automatically by the “Infolister” extension each time Firefox is started and copied to website during website updates.

There are rows in the above table (determined via JavaScript), about 27 rows are used for headings and notes, the rest would be individual extensions being described.

Keys to Interest Markings ♦  (#keysymbols)   <font color="#0000FF">&diams;</font>

♦ Must have for everyone (red star).
♦ Useful for everyone during installation process using (orange star #FFB900)
♦ Useful to everyone, easily installed and no special maintenance (magenta star #FF00FF).
♦ Must have for developers (those who look at the HTML source) and those who want control.
I am using regardless of what I think might be useful to others.  Those that show a Star in parens are among those that I don't actually need or use at least not often.
♦ Morphs the page's CSS into something better (aardvark, greasemonkey, platypus, read easily, uriid – more, detail -- #00C000)
◈ needed to avoid conflicts between extensions (keyconfig)
▽ obsolete or use a replacement (read descriptions), color may be retained from when it was viable. (&#9661;)
* external reference symbol is being used to indicate an extension that is listed as possibly problematic and have things you should watch out for.  But in general I don't have a problem with those that I actually use Adblock, GreaseMonkey, Linky, McAfee Site Advisor even though they are listed.
☹ (&#9785;) ☹
☹ Very serious usability problems, or ☹ -- Crashes/Freezes Firefox (&#9785; White Frowning Face)
<span style="font-size:144%;">&#9785;</span>
<span style="color:red;font-size:250%;">&#9785;</span>     -- font-size 144% or 250%
Extension name in italics usually indicates I'm not using it and it was either deactivated or uninstalled for now.  Author's name in italics no longer has any significance it used to mean look there for latest updates, or documentation.
Slackers – these are still not available in Firefox 1.5.  Some of those not compatible might actually have been incorporated into Firefox and if so, their documentation should be marked accordingly.  My slacker's list consists of Bandwidth Tester 0.5.5, Browse Images 0.3.2, Checky 2.5, Hotmail Tabs 0.0, URI id 0.0.8, View Selected 0.1 which are (still) incompatible with later versions of Firefox.
(sandbox) – the sandbox is now marked as experimental (see keyword “addons100:”)
Slackers Fx2 – there are far too many extensions  ! that have not been updated for Firefox 2.0 to be marking them in the extensions table yet, but here are the new/additional "slackers":  (and all will run okay if not checked for compatibility):  Extended Cookie Manager, Jump Link, Line Marker, Meta Tags, Open Long Urls, Read Easily, Search Cache, Tab Slide Show, Translate, Triple Select, X-Ray. [2006-11-19 3wks]]

May install these later:  del.icio.us, but I have installed what I needed a then some. 
FEBE allows you to quickly and easily backup your Firefox extensions, and transfer to another computer.

These are installed
CSS Viewer
EditCSS

Lost these with Firefox 1.5.0.1 coming from 1.5 (none are that important and should be back shortly) -- ATranslate.

May try these sometime in Future  (#amazing)

City info search, (US only) geography, population, ethnic composition, housing, climate, hospitals, airports, etc.
Data Analytics, enables importation, manipulation, analysis and graphing of data. (aid or bypass Excel) 299KB
Download Sort, automatically save downloads to different directories when using "Save Link As..." or "Save Image as...". 12KB.
Mozilla Accessibility Extension, makes it easier for people with a disability to view and navigate web content.  Developers can use the toolbar to check their structural markup to make sure it matches the page content. 115KB
No Squint 0.9.0, Jason Tackaberry, zoom text size by default and by domain, designed to help with small screens, and with higher resolution monitors (laptops).
Regular Expressions Testers, Regular Expressions Tester 1.0.3.5, by Sebastian Zartner, released on February 21, 2006, Testing Tool for regular expressions with color highlighting 13KB
Resurrect, Arantius - Trac, adds it's own 404 not found page, so that you can try to resurrect old version from one of these:  CoralCDN, Google Cache (plus text-only version), Yahoo! Cache, The Internet Archive, MSN Cache.  [Since you have look up individually you could at least as well using a bookmarklet]
View Dependencies - All Releases, 0.3.0.0, by Florian QUEZE, released on March 10, 2006, adds a tab to the "page info" window, in which it lists all the files which were loaded to show the current page. 16KB

And these

Almost but not quite what I would want (#almost)

downTHEMall!, 0.9.8.7, by The dTa Team, released on January 18, 2006, filter and download (not browse) - selected/filtered/all links contained in any web-page, 395KB  Too bad it's not just opening selected links in tabs because like the idea of filtering links. (see Linky)

Extensions Others Seem to Ask For (#notmything)

(reserved)

Avoid Useless Extensions that duplicate features  (#useless)

Useless
Extensions

Useless Extensions  (#moreuseless)

I consider the following extensions some of which may be very popular to be useless or prone to trouble for reasons set forth in the previous topic.  If you personally know the author or are very much on the same wavelength then they may be good for you, but I think they try to put too much into their extension and you can do much better with a few much smaller extensions or preference options that do exactly what you want.  Also be aware that if part of a massive do everything extension breaks the entire thing may be broken.

Good Choices for which alternatives are usually bad choices or bloated extesnsions (#choice)

Updates for Extensions (#updates)

Corrections for Addons site (#addons_corr)

Fx3 - Firefox 3 ♦ section FAQ, etc. (#fx3)  [also see Fx2 FAQ and notes]

Organization of this page:  Generate the Table of Contents (Alt+O) for this page and other webpages by installing the Document Map extension, then from the View menu, click on sidebar and then Document Map.  You are not at the top of the current page. 
firefox 3 tags keyword description create  places smart bookmarks

Fx3 - Concerns initial roll-out (#fx3rollout)

These may be of particular concern to many new users of Fx3.

Looking Forward to Firefox 3 (#fx3new)

The latest version of Firefox 2 is at http://www.mozilla.com/, and for those who would like to test Firefox 3 Beta you can obtain at http://www.mozilla.com/en-US/firefox/all-beta.html look for English, per Planet Mozilla (Nov 26, 2007, the one that is not British is the US version).  (or the less stable nightly latest-trunk builds).  Firefox 3.0 beta 2 due by year's end, Mozilla sets tentative release for Dec. 21; some bugs get pass to beta 3

Some of my experience with Firefox 3, and attempting to gain more information is on my page Places -- bookmark tags, as of yet nothing on how to use bookmark tags, just lots of problems because of starred bookmarks (quick bookmarks), and of making keyword bookmarks more difficult to create.

Firefox 3 Beta concerns Found (#fx3comments)

Fx3 Beta - Changes   (#fx3interface)
Fx3 Beta - Lost these extensions grayed out, can't make them singularly compatible   (#fx3ext)
Browser.bookmarks.overwritedefaultbooleanFalse more info ►
browser.places.importBookmarksHTMLuser setbooleanfalse 
browser.places.organizer.options.bookmarksuser setstringplace:queryType=1 
browser.send_pingsuser setbooleanFalse Bug: 401670, test ping
browser.urlbar.clickSelectsAlluser setbooleanFalse Turn off automatic select all on urlbar Ctrl+L, triple click will select all as will Ctrl+A [link] [reason]

Additional concerns and tweaks for Firefox 3 Beta testing are on places page, and on bookmarks page.

Other observations

Firefox 3.5.5   (#fx3p5)
See topics above concerning betas starting at Fx3 - Concerns initial roll-out
Fx3.6 Beta   (#fx3p6)
Firefox Future (fxfuture)
Here is the future of Firefox.  Kind of depressing that most of the changes are for the worse, and you have to get past those for things to get better.  Seems a lot of time is wasted on trivia that you can banish without any changes to Firefox.

Problematic Extensions (#problematic)

* Problematic extensions - MozillaZine Knowledge Base, lists known extensions that cause unwanted side effects in Firefox or in other extensions and plug-ins, along with recommended workarounds.  For other issues related to specific Firefox plug-ins, see the [article's] linked article.
Standard diagnostic - Firefox - MozillaZine Knowledge Base, This article offers a standard set of steps to follow as a last resort if Firefox is no longer working properly.
Firefox Help: How To Manage Profiles, Mozilla Firefox stores all your personal settings, such as bookmarks, passwords and extensions, in a profile.  The profile is stored on your hard drive in a profile folder.  [see profile elsewhere on this page]
Category:Issues (Firefox) - MozillaZine Knowledge Base, addresses problems that may occur with Firefox.

More Extensions * (#moreext)

I think you will find most of the useful extensions on this page, and you've seen above what I want in extensions and what I don't want and consider useless, now you can make your own choices, by searching for additional Firefox extensions as follows:
 
 Mozilla purposely eliminated it's Advanced Search (bug 372841 - 2007-03-06 - Bring back the advanced search options from v2 to Remora [Fx 2.0.0.3].).  Unfortunately this is triaged with bugs that do not make a bit of difference to me because I want to specify exactly what my system needs are and use it in my own keyword search or on my own search engine as created with Firefox or with "Add to Search Engine" extension.  Losing this ability for over two years is inexcuseable, but then the entire add-ons site has rapidly gone downhill with its offensive GUI styling.  Advanced Search has been restored (bug: 372841) in June 2008 a bit more limited but it is now at least available/accessible on each AMO page, and you can once again tie into it with your own keyword search or search engine.  Also see key word search page for "addons:" search so you can use the full power of Google to search AMO. 

Add a Customized Search Engine to FIND Extensions at * addons.mozilla.org/firefox – Important!!!    (#customsearch)

To install your own engine after installing the Add to Search Bar extension, click here to invoke a sort with no results [if link at left is still broken then click here for old search], then set up the “Advanced Options”, my suggestions are as follows: 
  Category: any, Type: Extensions, App: Firefox, Platform: Windows,    Date: Any,  Sort by: Newest Name, Per Page: 50

When finished with your settings, right click in the search form at the left of the search button and chose the Add to Search Bar.  Both “Add to Search Bar” and “Add a Keyword for this Search” were added to the context menu with the Add to Search Bar extension. 

When using your new search engine for extensions at addons, you should be aware that it is not like a Google search and works best with a single word or with the exact name of an extension for the search argument.  I like it because you can read about each extension found and click on the link for the extension to see user comments and additional information such as download size.  The search used appears to be rather primitive compared to modern search engines and requires that the search arguments should be in alphabetical order (2006-12-04).  Examples:

context (192), color (39), color context (2), context color (1), toolbar color (6), color toolbar (5), shortcuts (27), zoom (16), zoom mouse(2), mouse zoom(3)
 Mozilla purposely eliminated it's Advanced Search (bug 372841) so you can't use the above example even with the partially restored AMO Advanced Search, see 2007-06-14.

The addons site is better for add-ons but the search at mozdev.org for extensions actually uses a custom Google search:
http://www.google.com/custom?q=%s&cof=LW%3A458%3BL %3Ahttp%3A//www.mozdev.org/sharedimages/header.gif%3BLH %3A69%3BLC %3A%23990000%3BAH %3Aleft%3BS%3Ahttp%3A//www.mozdev.org%3BAWFID %3A39adc05eb4f99617%3B&domains=mozdev.org&sitesearch=mozdev.org

You might also find use of a keyword shortcut (“ext:s” or “addons:”) to use Google to search at addons:

  http://www.google.com/search?q=inurl%3Aaddons.mozilla.org+ OR+inurl%3Aextensionroom.mozdev.org+firefox+%S
  http://www.google.com/search?q=site:addons.mozilla.org%20inurl:firefox+%S    [additional improvements to addons: keyword shortcut below]
  http://www.google.com/search?num=100&q=site%3Aaddons.mozilla.org +inurl%3Afirefox+install-now +-inurl%3Arecommended +-inurl%3Aphp+%S

For the crowd that goes for popular extensions and lists of favorite top xx extensions:
 ●  I want a Firefox Extension to ... 200+ common problems solved : eConsultant (listed by categories). 

But for those that want more Practical extensions, you are already on the correct page and they can be found above on this page, and the comments are more precise and informative, along with usage tips, and below the list of extensions is a practical guide on how to on avoid useless extensions many of which are popular. (Extension list is listed alphabetically).

Security in your web Browser   (#security)

Security Considerations in Firefox

Firefox provides more inherent security than Internet Explorer, but you can improve your security by blocking unwanted third party advertising that makes a mockery of the privacy statements on large company sites, where they absolve themselves of many practices carried out by another company on their behalf.  Firefox 1.0PR has ad blocking almost built-in (ADBLOC extension).  Turn off popups.  Firefox 1.0 has the ability to view blocked pop-up advertising and to selectively allow and disallow pop-ups from individual Web sites.  Some about:config items to consider, they may keep you out of sites though, so you may end up using the defaults.
  1. network.http.sendRefererHeader set to 0 (default is 2) see http://www.spreadfirefox.com/node/5841
  2. browser.send_pings set to False (default is True)
Some privacy concerns to keep in mind, not necessarily related to a browser.

Tools Options of Interest (#options)

General:  Perfectly happy for now to NOT have Firefox check if it is the default browser, because Firefox is picking up the links from Email and postings, and leaving use of Explorer to IE.  (Firefox was the last one installed)  Done later, but Firefox is now my default browser.

Privacy: History (21 days instead of 10 my choice), Cache, Up to 20000 KB of disk space for the cache — This is a performance issue based on bug reports and should be reduced from 50000KB

Content (Web Features): turn off Java, but leave JavaScript turned on.  Looks like I have both of them on now.

Tabs:
Open links form other applications
    (•) in a new tab in the most recent window
[ ] Hide the tab bar when only one web site is open.
[x] Select new tabs opened from links
[x] Select new tabs opened from bookmarks or history (option was moved to somewhere else)
[x] Warn about closing multiple tab

Advanced, Accessibility
[ ] Allow text to be selected with the keyboard (caret browsing, keep this off)
[x] Begin finding when you begin typing

Dial-up considerations, suggestions   (#dialup)

Firefox with it's tabbed browsing works very well with dial-up access, as you can load up several tabs from links with Ctrl+Shift+Click, or from Open all files in a folder (bookmarks) into tabs.  You can read the first tab or continue to read the first tab while other tabs are loading.  Some other things you can do to help with dial-up.

Tools, Options, Content, [x] Load Images, [x] For the originating site only.  You can also modify allowed/disallowed sites.

Adblock, one of options is to “Remove Ads” instead of simply hiding them (actually in development not production), supposedly this prevents them from loading in the first place.

I am no longer on dial-up, but Firefox made things a lot easier on dial-up

Web Developer can make setting options in tools and other preferences easier -- watch out for second and third level menu directories that may obscure that you've changed/disabled something.

Defeat Location bar Search (#locationbarsearch)

You have a built-in searchbar with Firefox, there is no reason to have a search start from the Location bar, when you have the search bar and the ability to use shortcut.  Some people don't mind being hijacked to a page they didn't ask to go to, but I find it annoying.  Anyway these are customizations and you choose what you want to do or don't want to do.

If you enter a non address into your Location bar in the form of multiple words you will get a “I'm feeling lucky” search, which is controlled by keyword.URL which defaults to: 
  http://www.google.com/search?btnI=I%27m+Feeling+Lucky&ie=UTF-8&oe=UTF-8&q=
and changing that seems to stop multiple word searches.  For single word entry, Firefox will insert http://www.  in front and insert a suffix of .com to the single word.  See topic:  Change the search mode in the address field in Firefox Help: Tips & Tricks again not needed, because you have shortcuts for (.com, .net, and org).  Changing the site name to 127.0.0.1 will try to find the file on your machine, where it will not be found; therefore, an automatic error.  What follows is a change you can make to your preferences in user.js or using about:config on your location bar with the following change.

keyword.URL               http://127.0.0.1/search?xyz=%s  
keyword.enabled           False  (default is True)
googlebar.searchoption    False  (Googlebar is an unwanted extension)
The unwanted default for keyword.URL is http://www.google.com/search?ie=UTF-8&oe=UTF-8& sourceid=navclient&gfns=1&q=   which can be restored with right-click then Reset.

Additional Location Bar Things  (#locationbar_things)

Bookmark Shortcuts, Keyword Shortcuts Creation and Keyboard Shortcuts   (#keywords)

Mozilla Custom Keywords, create shortcuts for your favorite search engines, and other sites.   I have mine set up for a web search, get to the chrome directory, search a few selected sites, dictionary, wiki, stock quotes -- things that can use the substitutions for the %s at the end.

Suggest putting your keyword shortcuts in their own folder.  Anything after the keyword in the location bar will replace %s in the shortcut bookmark.  My folder is named K within my Bookmarks Toolbar.  The folder doesn't have to be readily accessible for use but you want to have fairly quick access to add items to it, and to help you “remember” the shortcuts you created.  I choose to put a colon at the end of the word.  More information: SitePoint Forums - Issue #64 - Team Tips (Cont'd...)   The following may be customized for my own use but give you an idea of what you can use.
 

Keyword Shortcuts are one of the most important features in Firefox, and so have created a new page where you can learn more about shortcuts and how I use mine, including shortcuts to get to the Firefox Profile (profile:) directory and the Firefox chrome (chrome:) directory. 
— Proceed to my Keyword Shortcuts page —

Set your home page [home], and your throbber [throbber] pages   (#homepage)

You will have to reinstate your home page choice if you reinstall Firefox. You can change the address for your home page icon (or Alt+Home) under tools, options, advanced.  You can no longer [Fx2] use a simple change to your configuration preferences to get another page on the throbber, but you can get up to four pages with the "Throbber Button" extension.   Beware of theft of your homepage, you don't want to reply to some website including Mozilla asking if you want them to be your home page.  Check using  about:config   for “home” as home page change may be temporary override.

Multiple Home Pages

You can select all tabs in the window to be used as Multiple Home pages, by separating files with an vertical pipe symbol, |, choosing Options, General, Use Current Pages, or even reference a folder of bookmarks (ref. Firefox options].  Most people would be annoyed with starting up multiple pages when a new Firefox window is started, especially since there are lots of other options available such as a folder of bookmarks possibly on the bookmarks toolbar that gives you the option of open everything in the folder, lots of extensions, lots of search engines for the Firefox search bar from Mycroft, and you can make up keyword shortcuts.

Problems with Home Pages

Unlike IE, Firefox does not have a user set lock on toolbars and home page to prevent theft of home page.  Installing a package to run on your ISP typically changes a homepage, but fortunately they usually just hit IE.  Software with a laptop designed for wireless use at different locations (work, home, travel) may change home page depending on location – i.e. ThinkVantage Access Connections installed on all ThinkPad laptops (solution).

If you provide an incorrect home page url, you will probably get the same error that you would get for any other incorrect url that is not found -- "Firefox can't find the server at www.example.com."

Batch Start of Firefox (#batch)

There are several useful ways of starting Firefox in Batch, including bring up a specific page (like homepage), ability to have more than one profile in use at same time, bring up a specific profile, bring up safe mode.

User Files and Extensions in Firefox (#files)

Downloads can be seen from Tools, Downloads (Ctrl+J), and are maintained
in file:///c:/Documents and Settings/userid/My Documents/My Downloads
-- the location is actually defined in Tools, Downloads, Show Folder (button)
 
Extensions (installed) can be identified from Tools, Addons.  Note the buttons at the bottom: Uninstall, Update, and Options, and the link Get More Extensions.  Select an installed extension and use the Options button to change the options for a particular extension.  Use the link to check for additional extensions categorized at MozDev.  The install.log can be found the same directory that Firefox is installed in.

Changes to Web Pages (#changes)

You might want to check updates to webpage, to see changes that are made on a daily basis or other timespan.  Just so you know I update my pages frequently for very minor changes so you might not want to omit or increase the time between checking my page.

Pests Removed   (#pests)

Major Problems     (#majorproblems)

Also see Problems above, and Related below.
Some of the following include links to the executable software that I have installed on my computer and are identified as either “.exe” or /\ (so those links may not work for you).  Using Internet Explorer you would simply click on those links to invoke those programs if installed to the same directories as on my machine.  Firefox won't allow you directly run a program from a link, but you can if you invoke those links through Launchy and then Open in Windows Explorer.   You will have to have installed Launchy and have set up your launchy.xml as I have shown on my launchy_notes on this page. 

Installation and other problems covered earlier.

bookmarklets_demo: [ link to here, so you can return here after clicking on a link below]
If you are using Firefox, you should remain current, and you can check at mozilla.com/firefox (or at mozilla.org).   The current browser is at least Firefox/3.5.1 [public July 16th, 2009] which should show no less than Gecko/20090715, later updates will show a later date.  Upgrading from earlier than 1.5 requires more than an update, you must go to mozilla.org and download the latest version.  Also check CERT.
 
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