Find all the tools and resources you need to make your first add-on.
Like these? Find more add-ons in the Web Developer's Toolbox collection.
Baseball Boom includes: links to great baseball sites, MLB team-selector,...
Weekly rankings and NFL news for fantasy football directly from...
Like these? Find more add-ons in the Sports Fanatic collection.
Like these? Find more add-ons in the Reference Desk collection.
Like these? Find more add-ons in the Online Shopping collection.
Search all Travel, Shopping, Job Search and lot more sites. Supports over 20...
ScribeFire is a full-featured blog editor that integrates with your browser...
Like these? Find more add-ons in the Traveler's Pack collection.
Easily find and manage your browser tabs.
FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. It offers more features than SwitchProxy, ProxyButton, QuickProxy, xyzproxy, ProxyTex, TorButton, etc.
The Cooliris 3D Wall -- Simply the fastest and most stunning way to browse photos and videos from the Web or your desktop. Effortlessly scroll an infinite "3D Wall" of your content from Facebook, Google Images, YouTube, Flickr, and hundreds more.
Search all your favourite sources from a single place, remember what you find so you can get back to it later and easily share what you find with friends. It personalizes the right-hand side of your search with Wikipedia, YouTube, Twitter and more

Collections are a way for you to categorize, mix, match and mingle add-ons. Subscribe to collections created by other users or create your own.
Seamlessly Perfect Windows 7 Theme for Firefox 3.5 - Google Tweaked - Time Conserving add-ons (skip screen, showcase, smarterfox) - Stylish Add-on with Styles list!
Speed up the development process by using add-ons to troubleshoot, edit, and debug web projects without ever clicking away from Firefox.
Make the librarian jealous with add-ons that help students, researchers or anyone with a tough question find and document all the answers.
Ten broadly useful extensions, as detailed at: http://bit.ly/10Xxc (There are technically 10, but Gears can't be installed from Mozilla's site)
Lifehacker's "Better" add-ons, compiling multiple Greasemonkey tweaks for YouTube, Reader, Gmail, Google Calendar, Flickr, and other sites.