Firefox
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ImTranslator by Smart Link Corporation
ImTranslator includes Online Translator in 1640 language combinations for Albanian, Arabic, Bulgarian, Catalan, Chinese (Simp.), Chinese (trad.), Croatian, Czech, Danish, Dutch, English, Estonian, Filipino, Finnish, French, Galician, ...
Google Assistant - Surf Canyon by mikewertheim
Unleash the power of search like never before. Improve relevancy by up to 40% on Google, Yahoo!, Bing, Lexis Web and Craigslist by automatically digging out information from as deep as page 100.
Fire.fm by jorge.villalobos, jose.bolanos
Fire.fm gives you access to the extensive music library on Last.fm. Last.fm gives free radio to the US, UK, and Germany, plus subscriber-based service to the rest of the world. Listen to your favorite music and discover new artists in the ...
TwitterBar by Christopher Finke
Post to Twitter from your address bar.
FoxyProxy by Eric H. Jung
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.
Collections
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Windows 7 Theme for Firefox 3.5 by enkei
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!
Web Developer's Toolbox by Mozilla
Speed up the development process by using add-ons to troubleshoot, edit, and debug web projects without ever clicking away from Firefox.
Reference Desk by Mozilla
Make the librarian jealous with add-ons that help students, researchers or anyone with a tough question find and document all the answers.
Lifehacker's Must-Have Extensions by Lifehacker.Addons
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)
Better Pack by Lifehacker.Addons
Lifehacker's "Better" add-ons, compiling multiple Greasemonkey tweaks for YouTube, Reader, Gmail, Google Calendar, Flickr, and other sites.
