Install
clicks is available in Ubuntu. [?]
Ubufox extension for Firefox
Ubuntu Firefox specific configuration defaults and apt support
Flashblock extension for Firefox
mozilla extension that replaces flash elements with a button
Adblock Plus extension for Firefox
advertisement blocking extension for web browsers
Ubuntu-it menu extension for Firefox
Firefox extension for a quick browse of Ubuntu-it community
Firefox Launchpad plugin
Launchpad firefox integration
Greasemonkey extension for Firefox
dummy transitional package for firefox-greasemonkey -> greasemonkey
Speed Dial extension for Firefox
Speed Dial for fast access to your most visited websites.
Foxyproxy extension for Firefox
advanced proxy management tool for Firefox
All in one Sidebar extension for Firefox
A sidebar extension for Mozilla Firefox
Lightning extension for Thunderbird
Calendar Extension for Thunderbird/Icedove
Web Developer toolbar for Firefox
web developer extension for the Firefox web browser
No Script extension for Firefox
Javascript/plugins permissions manager for Iceweasel and Iceape
Firebug extension for Firefox
web development plugin for Firefox
Imagezoom extension for Mozilla suite
Mozilla context menu option to zoom current image
Stumbleupon extension for Firefox
Mozilla addon for sharing interesting websites
Context Menu extensions for Firefox
Context Menu Extensions for Firefox
LiveHTTPHeaders extension for Firefox
Adds information about the HTTP headers to Firefox and SeaMonkey
Beagle extension for Firefox
Beagle extension for Firefox
Firefox Showcase extension for Firefox/Iceweasel
Showcase provides a new way to manage your Firefox tabs and windows.
Enigmail extension for Thunderbird
Enigmail - GPG support for Thunderbird