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).
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.
A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.
Adds ClickOnce support and the ability to report installed .NET versions to the web server.
FEBE (Firefox Environment Backup Extension) allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up -- It will actually rebuild your extensions individually into installable .xpi files.
Email This! will send your recipient the link, title, & highlighted text of the page you are viewing using GMail, Google Apps GMail, Yahoo, and Stand-Alone Mail Clients like Outlook Express, Thunderbird, & More!
Nautipolis for Firefox: a blend of retro, nautical, Areo and Gnome. Designed for daily use, with consistent layout, buttons, widgets, with support for many extensions.
Install the About Home Themer extension to also theme the about:home page.
Select text and it's automatically copied to the clipboard. Also pastes on middle click.
RSS Ticker loads your Live Bookmarks and scrolls their entries across your screen while you surf.
The Feed Sidebar is an extension for Firefox that displays the items from your Live Bookmarks in the sidebar.
(Formerly Local Install) The primary goal of this extension is to provide the tools needed to install and manage extensions and themes locally and tons of other features.
Note: With Toolkit 6.0 Auto Archiving is fully working in Firefox 2.0 and temp...
Note from Mozilla: This add-on has been discontinued. Try Forecastfox Weather instead.
Get international weather and weather forecasts with Forecastbar Enhanced.
An extension that allows for the use of dynamic commands in Firefox.
A maintained version can be installed via: https://bitbucket.org/satyr/ubiquity/downloads/tip.xpi