My List of Firefox Developer Extensions

• Aardvark 3.0 (Disabled, Incompatible) Utility for cleaning up a page prior to printing, and for analyzing a page.
• Arboreal 0.1a2 (Disabled, Incompatible) A Firebug extension for DOM tree visualization.
• Auto Reload 1.12 Reload current page when selected local files have changed.
• Character Identifier 0.1.4 This extension adds a context menu item for selected text that provides more information (from the Unicode database) about the characters selected.
• Clear Cache Button 0.9f Adds a button to the toolbar that clears the browser cache
• ColorZilla 2.8 Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies
• CopyAllUrls 0.9.6 Copies and pastes all URLs of open browser tabs including history in structured and well defined form to and from the clipboard.
• CSS Usage 0.2.9 Firebug extension to view which CSS rules are really used on your site.
• CSSViewer ff 3.5 1.0.4 (Disabled, Incompatible) A simple CSS property viewer en FF 3.5
• DownThemAll! 2.0.13 The mass downloader for Firefox.
• EventBug 0.1b10 Event views for Firebug.
• FireDiff 1.2.0 Track changes in Firebug
• FireFile 0.9.0 Firebug extension to save the CSS files edited with firebug live to your web server.
• FireFontFamily 0.1.2 Highlight the rendered font-family in Firebug
• FireLinkReport 0.1 (Disabled, Incompatible) Page link report for Firebug.
• FireLogger 1.2 Server-side logging support for web developers
• FirePath 0.9.7 FirePath is a Firebug extension that adds a development tool to edit, inspect and generate XPath 1.0 expressions, CSS 3 selectors and JQuery selectors.
• Firepicker 1.4.1 Simple color picker plugin for Firebug.
• FireQuery 1.2 Firebug extension for jQuery development
• FireRainbow 1.5 Javascript syntax highlighting for Firebug
• Flagfox 4.1.17 Displays a flag depicting the location of the current server
• Gmail Manager 0.6.4.1 Manage multiple Gmail accounts and receive new mail notifications.
• GMarks 1.0.3.3 Shows your Google Bookmarks in the sidebar.
• Greasefire 1.0.8 Automatically find Greasemonkey scripts on Userscripts.org
• Greasemonkey 0.9.22 A User Script Manager for Firefox
• gTranslate 0.9 Translates the selected text via Google Translate.
• Hybridfox 1.6.000030 (Disabled, Incompatible) A graphical interface to Amazon’s EC2 and Eucalyptus web service.
• IE Tab 2.0.20120203 Enables you to use the embedded IE engine within Mozilla/Firefox.
• Inline Code Finder for Firebug 1.1 Finds HTML elements with inline JavaScripts events, inline styling and javascript: links
• KGen 0.8.1 Display strongest keywords of a webpage
• LogMeIn, Inc. Remote Access Plugin 1.0.0.664
• Page Speed 1.12.9 Speed up your web pages with this performance diagnostics tool. Requires Firebug.
• PDF Download 3.0.0.2 Allows you to choose what to do with a PDF file: download it, view it with an external viewer or view it as HTML.
• phplangeditor 2.4 (Disabled, Incompatible) PHP language files editor
• Prism for Firefox 1.0b3 (Disabled, Incompatible) Create Prism applications directly in Firefox
• RefControl 0.8.16 Control what gets sent as the HTTP Referer on a per-site basis.
• Regular Expressions Tester 3.2.11 Testing tool for regular expressions with color highlighting (including submatches) and helpers for creating expressions
• SenSEO 2.4.5 SenSEO ist an extension checking SEO-critical on page criteria.
• Server Spy 0.2.1 Indicates what brand of HTTP server runs on the visited site.
• Server Switcher 0.5.3 Switch between your development and live servers.
• SQLite Manager 0.7.7 Manage any SQLite database on your computer
• Wappalyzer 2.2.1 Identifies software on the web.
• XRefresh 1.2 (Disabled, Incompatible) Browser refresh automation for web developers
• YSlow 3.1.3 Make your pages faster with Yahoo!’s page performance tool