Featured Extensions

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Tamper Data Featured

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

Rated 4 out of 5 stars (130)
113,621 users

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.

Rated 5 out of 5 stars (203)
275,894 users

Video WithOut Flash No Restart Featured

Watch videos without flash

Rated 4 out of 5 stars (53)
84,354 users

QuickMark No Restart Featured

A quick and minimalistic way to create bookmarks.

Rated 5 out of 5 stars (38)
8,613 users

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.

Rated 5 out of 5 stars (264)
17,586 users

Converter Featured

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.)

Rated 5 out of 5 stars (74)
9,919 users

Private Tab No Restart Featured

Adds private tabs.

Rated 5 out of 5 stars (195)
72,051 users

Free Memory No Restart Featured

An add-on to perform free-memory operations without visiting about:memory.

Rated 4 out of 5 stars (47)
27,240 users

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.

Rated 4 out of 5 stars (96)
86,231 users

Bloody Vikings! Featured

Simplifies the use of temporary e-mail addresses in order to protect your real address from spam. Supports inter alia 10minutemail.com and anonbox.net.

Rated 5 out of 5 stars (44)
13,777 users

Clean Links No Restart Featured

Converts obfuscated or nested links to genuine clean links.

Eg: http://somesite.com/?to=www.example.comhttp://www.example.com/

Rated 5 out of 5 stars (96)
36,946 users

Mozilla Archive Format, with MHT and Faithful Save 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!

Rated 4 out of 5 stars (257)
177,711 users

FireGestures Featured

A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.

Rated 4 out of 5 stars (874)
390,236 users

Wired-Marker Featured

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 ...

Rated 4 out of 5 stars (140)
11,138 users

Prevent Tab Overflow No Restart Featured

Make sure your tabs stay visible all the time.

Rated 5 out of 5 stars (48)
12,258 users

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.

Rated 5 out of 5 stars (147)
90,864 users

Torrent Tornado Featured

A Torrent Client for Firefox and SeaMonkey, runs everywhere, created in pure JavaScript without binary software!

Rated 4 out of 5 stars (45)
32,013 users

Evernote Clearly Featured

Evernote Clearly makes blog posts, articles and webpages clean and easy to read. Save them to Evernote to read anywhere.

Rated 4 out of 5 stars (178)
117,518 users

Greasemonkey Featured

Customize the way a web page displays or behaves, by using small bits of JavaScript.

Rated 4 out of 5 stars (956)
1,238,883 users

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)!

Rated 5 out of 5 stars (143)
12,087 users