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 first and only download manager/accelerator built inside Firefox!
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.
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.
Use this extension to save things you see on the web into your Evernote account. It provides a toolbar button and context menu to add an article, selection, URL or an entire page.
The original Gmail notifier for multiple accounts. Allows you to receive new mail notifications along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.
Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.
Secure Login is an extension for Firefox integrated password manager.
Display all Google services as buttons or as a space-saving dropdown menu next to your address bar. Reach services like Gmail, Google reader, Google maps, Google calendar, and many more in a single click from your browser.
Bypass compulsory web registration with the context menu via www.bugmenot.com.
Combined with the ChromeToPhone application for Android, this extension allows to send urls, text and files from Firefox to your phone or tablet.
Adds the number of unread messages and chat notifications in Gmail to the favicon. This addon is now compatible with Firefox 4.0, as appears to work with Gmail at the time of this update. (May 11th, 2011.)
Extends the Mozilla Add-on Collector allowing to install multiple add-ons with a single click. NOTE: This addon is no longer in development. It is still here for the convenience of existing users. Do not download unless you know what you are doing!!!
Collections are groups of related add-ons that anyone can create and share.Explore Collections