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FEBE Firefox Extension
FEBE 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. NowGreasemonkey
Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.ScribeFire (previously Performancing for Firefox)
ScribeFire (previously Performancing for Firefox) is a full-featured blog editor that integrates with your browser and lets you easily post to your blog.GMailUI: Thunderbird Extension
GMailUI is an extension to Thunderbird (versions 0.8 - 1.5.0.x) which add concepts inspired by GMail to Thunderbird, like archiving mail and powerful message searching across all folders.GreaseSpot
GreaseSpot is community documentation for user scripting with Greasemonkey.ShiftSpace
ShiftSpace is an open source layer above any website. IShiftSpace provides tools for artists, designers, architects, activists, developers, students, researchers, and hobbyists to create online contexChickenfoot Firefox extension
Chickenfoot is a Firefox extension that puts a programming environment in the browser's sidebar so you can write scripts to manipulate web pages and automate web browsing. In Chickenfoot, scripts areGoogle Calendar Quick Add Firefox Extension
It adds a new shortcut (CTRL + ; [semi-colon]) to your browser window that launches a simple text dialog. In the text box you can enter whatever you would in the Google Calendar Quick Add feature andFireBug
FireBug lets you explore the far corners of the DOM by keyboard or mouse. All of the tools you need to poke, prod, and monitor your JavaScript, CSS, HTML and Ajax are brought together into one seamlesFirePHP - Firefox Extension for PHP Development
FirePHP allows you to take a deeper look at all the work your PHP code does to generate that page you are currently looking at in your Firefox browser.
