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.
Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Shareaholic is the easiest way to share interesting links using Facebook, Twitter, Google Mail, Reader, Bookmarks, Evernote, Bitly, StumbleUpon, and more... from one simple ALL-IN-ONE add-on. This is the ultimate tool for the link sharing addict!
A light-weight Google search toolbar for Firefox. Offers 14 search types, search history auto-completion, customizable toolbar (place it anywhere), search word highlighting, and...
GMarks helps you sync & manage your bookmarks with Google Bookmarks...
Navigate up one or more URL levels, by clicking on icon in URL bar, or using icon's context menu, or pressing shortcut key.
Collections are groups of related add-ons that anyone can create and share.Explore Collections