To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!Close
Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Tamper Data Featured
Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...
YouTube High Definition No Restart Featured
YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.
Video WithOut Flash No Restart Featured
Watch videos without flash
QuickMark No Restart Featured
A quick and minimalistic way to create bookmarks.
Integrated Inbox for Gmail and Google Apps No Restart Featured
Tired of having multiple tabs open just to view your favorite Google services and other Apps like Feedly, Evernote, Twitter and more? Now you can see them right from your Gmail Inbox.
Install now or visit www.integratedinbox.com for more info.
Contextual (inline) unit, timezone, and currency converter on any web site, plus custom conversions for offline text. Shopping assistant also included -- find the best deals online! (Currency conversions and shopping assistant disabled by default.)
Private Tab No Restart Featured
Adds private tabs.
Free Memory No Restart Featured
An add-on to perform free-memory operations without visiting about:memory.
Google™ Translator No Restart Featured
Google™ Translator is a handy multi-language translator built on top of Google Translate. It gives you Google Translate UI feel right on your Firefox toolbar.
Bloody Vikings! Featured
Clean Links No Restart Featured
— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!
A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.
Wired-Marker(http://www.wired-marker.org/en/) is a permanent (indelible) highlighter that you use on Web pages. The highlighter, which comes in various colors and styles, is a kind of electronic bookmark that serves as a guide when you revisit a Web ...
Prevent Tab Overflow No Restart Featured
Make sure your tabs stay visible all the time.
Theme Font & Size Changer No Restart Featured
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
Torrent Tornado Featured
Evernote Clearly Featured
Evernote Clearly makes blog posts, articles and webpages clean and easy to read. Save them to Evernote to read anywhere.
Fastest Search - Browse/Shop Faster! No Restart Featured
Search/browse/shop faster than ever! Ctrl-Shift-F for whole-word/regex/all tabs/diacritic search;create custom engines;shopping assistant compares price;Smart SearchBox;Preview results;Auto copy plain text, dnd save image/open link.Use v3.363(below)!