Most Popular Extensions
EPUBReader Requires Restart
With EPUBReader you can read ePub files just in Firefox. No additional software needed!
HTTPS Everywhere Requires Restart Featured
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
Lightbeam for Firefox Featured
Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.
Ant Video Downloader Requires Restart
It has never been simplier to download videos from Youtube, Dailymotion and from most of the video streaming site.
Just play the video, click on the toolbar, download and play it immediately in our integrated video player.
A very lightweight add-on that allows you to watch YouTube™ videos using Flash® Player instead of the default HTML5 player. The Flash® Player will consume less material resources (CPU, RAM) if your PC doesn't easily support HTML5 videos. Try it!
Keep your Firefox bookmarks on Windows up to date with your Safari bookmarks on iPhone, iPad, and Mac with the iCloud Bookmarks extension for Firefox.
Join WebEx meetings using Firefox ™
DuckDuckGo Plus Featured
DuckDuckGo is the search engine that doesn't track you. This add-on makes DuckDuckGo your default search engine and includes some other useful features.
FireGestures Requires Restart Featured
A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.
Speed Dial Requires Restart
Direct access to your most visited websites
AdBlocker for YouTube™ Featured
AdBlocker for YouTube™ removes all annoying Ads from YouTube
Use the Evernote Web Clipper to save things you see on the web into your Evernote account.
friGate Requires Restart
Открывает сайты, заблокировнные злым "админом" вашей компании, сети или провайдера. Недоступен Сайт? через прокси friGate откроет!
Google Translate, ImTranslator, Dictionary, TTS Requires Restart
COMPLETELY REDESIGNED TRANSLATOR FOR FIREFOX
ImTranslator translates text, words, webpages between more than 90 languages.
NEW: Inline Translator, Dictionary, access to Google Translate, Microsoft Translator. Unique on the fly localization.
User Agent Switcher Requires Restart
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
BlockSite Requires Restart
BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.
Easy Access Requires Restart
Allow an easy access to the system commands and other programs in your computer.
Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.
ipFlood Requires Restart
Simulate the use of a series of proxy changing at each new connection.