Actively blocks Google Analytics from running on your Firefox, manually stopping the website you visit from tracking you!
The greatest user script engine on the Internet (a fork of Greasemonkey).
This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.
Automatically find user scripts on Userscripts.org (requires Greasemonkey or Scriptish)
Adds a 'HTML 5 Validator' context menu item to a page's context menu.
Adds a 'Copy HTML' context menu item which allows you to copy the HTML for the selected content.
Provides the ability to block specific image requests easily.
This jetpack allows you to quickly translate text with Google Translate.
Adds a "Sort Tabs" context menu to tabs, which sorts tabs by title (future versions will offer more options).
Show a loading bar behind the location bar when opening a new page.