1. Aardvark{2.97}.xpi -- Utility for cleaning up a page prior to printing, and for analyzing a page.
2. AdblockPlus{1.1}.xpi -- Ads were yesterday!
3. BetterPrivacy{1.29}.xpi -- "Super-Cookie Safeguard"
4. DownloadHelper{4.5}.xpi -- Download videos and images from many sites
5. DownloadStatusbar{0.9.6.5}.xpi -- View and manage downloads from a tidy statusbar
6. FEBE{6.1}.xpi -- Backup your Firefox data
7. Firebug{1.4.0}.xpi -- Web Development Evolved.
8. GooglePreview{3.22}.xpi -- Localized description in *.properties file.
9. ReaditLater{0.9947}.xpi -- Save pages to read later, then bookmark.
10. Screengrab{0.96.1}.xpi -- Saves a web-page as an image.
11. WebDeveloper{1.1.8}.xpi -- Adds a menu and a toolbar with various web developer tools.