Find all the tools and resources you need to make your first add-on.
Like these? Find more add-ons in the Online Shopping collection.
Pickemfirst is your fantasy sport assistant. It will save you time and help...
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 Web Developer's Toolbox collection.
ScribeFire is a full-featured blog editor that integrates with your browser...
Most easy, highly customizeable, and quick Firefox translation interface:...
Deep Web Search Engine. If you know little bit of javascript, you should be...
Like these? Find more add-ons in the Traveler's Pack collection.
FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.
Glue helps you find your next favorite movie, book, or music album. As you visit sites like Amazon, IMDB, and Wikipedia, Glue suggest things you'll like.
Get visual video summaries and related videos on Twitter, Google, YouTube, Yahoo! and more. See the contents of a video link before you click to watch the video.
This splits the content area of the browser window as you like.
Free browser add-on from Mozilla Labs that keeps your bookmarks, saved passwords, browsing history and open tabs backed up and synchronized, with end-to-end encryption for your privacy and security.

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.