Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
This works also for audio and picture galleries.
Save time by speeding up repetitive tasks. Get faster, parallelized downloads, see definitions, auto-load the next page, improve searching, and more. FastestFox will dramatically enhance your productivity!
Hide My Ass! operates the most popular browser based web proxy online, this is our official extension that enables you to easily redirect your web traffic through our anonymous proxy network.
Adds links to convert and download Youtube, MyVideo, Clipfish, Sevenload, Dailymotion, MySpace videos as MP3 files. Visit our site: http://www.video2mp3.net for more information
AddThis for Firefox is the best add-on to make sharing and bookmarking simple. Have all your favorite web 2.0 social networking, bookmarking, blogging, and e-mail services at your fingertips. Share any page, anytime, with anyone.
Adds a download button to YouTube. By clicking on it you can download the video as a high quality mp3 file.
Browse faster—Preview links and images without leaving your current page or tab. Just mouseover any link and a preview window appears to display the content.
Customize your bookmarks bar with Roomy Bookmarks Toolbar
Bypass compulsory web registration with the context menu via www.bugmenot.com.
This extension notifies you when new messages arrive in your Yahoo mailbox.
NOTE: If you are having issues with the add-on reporting connection errors, try updating to version 188.8.131.52.
Creates a menu to access google bookmarks from any computer. Needs Google Account to use this extension.
Have you noticed that everybody looks the titles of your open tabs? It has a name: Paranoia! And a solution too: TabRenamizer!
89 weekly downloads
The Mycroft Project is a collection of OpenSearch & Sherlock Search Engine Plugins for your internet browser.