Web Directory

» Chrome List
   Browse all the chrome packages registered with Firefox in a convenient tree view.
   http://www.gijsk.com/mozilla/chromelist/

» Chromebug
   Chromebug is the Firebug code adapted for XUL applications. It is the debugger that Firebug developers use to develop Firebug.
   http://blog.getfirebug.com/category/chromebug/

» Console²
   Replaces the JavaScript Console. Display errors filtered by type (Errors, Warnings, Messages), language (JavaScript, CSS, XML) and context (Chrome, Content).
   http://console2.mozdev.org/

» Execute JS
   Execute arbitrary code and modify JavaScript functions.
   http://www.mouseless.de/index.php?/content/view/18/31/

» Extension Developer's Extension
   Meta-extension for developers. Allows test JavaScript, prototyping XUL layouts and building XPI packages.
   http://ted.mielczarek.org/code/mozilla/extensiondev/

» Javascript Command
   Tools for writing/testing JavaScript on Firefox windows, web pages, and bookmarklets. [Requires Login]
   https://addons.mozilla.org/firefox/addon/5058

» Leak Monitor
   Detects one very specific type of leak in web sites and chrome JavaScript.
   http://dbaron.org/mozilla/leak-monitor/

» MR Tech Local Install
   Provides tools to install and manage extensions and themes locally.
   http://www.mrtech.com/

» Nightly Tester Tools
   Adds a few extras useful to those that regularly test nightly builds of Firefox, Thunderbird, Sunbird and Toolkit Seamonkey (Suiterunner). Features: Extension compatibility fixing, titlebar customization, build ID retrieval, screen-shots, talk-back inform
   http://www.oxymoronical.com/web/firefox/nightly

» Quick Locale Switcher
   Adds the ability to switch the general.useragent.locale, HTTP Accept language header and spell checker dictionary.
   http://www.captaincaveman.nl/firefox-extensions-quick-locale-switcher.aspx

» SQLite Manager
   Shows the database structure in an intuitive hierarchical tree. Browse and manage tables, indexes, views and triggers.
   http://code.google.com/p/sqlite-manager/

» Update Channel Selector
   Allows you to change the update channel from where your application receives updates.
   http://www.oxymoronical.com/web/firefox/updatechannel

» UxU - UnitTest.XUL - ClearCode
   Testing framework for Mozilla add-ons.
   http://www.clear-code.com/software/uxu/index.html.en

» XPCOMViewer
   Easy exploring of XPCOM components.
   http://xpcomviewer.mozdev.org/