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 best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.
Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.
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.
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
Make any pages' search functionality available in the Search Bar (or "search box")...
StumbleUpon is the easiest way to discover new and interesting photos, videos, web pages and more, recommended by a community of experts. Tell us what you are interested in and we recommend page after page of amazing stuff you’d never expect to see.
TV Add-on for Firefox - Watch TV directly from your Firefox Browser, 2780 Live TV Channels sorted by country & category, the TV-FOX allow you to watch thousands of TV channels freely available on the internet. powered by the biggest and most up t...
Bypass compulsory web registration with the context menu via www.bugmenot.com.
Expands the context menu's 'Search for' item into a list of installed search engines, allowing you to choose the engine you want to use for each search.
Useful tools for the nightly tester.