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ColorZilla is an extension for Mozilla Firefox and the Mozilla Suite.

Pennypacker is a Firefox extension that enhances Penny Arcade with favourites.

Tweak the network settings of Firefox for faster downloading of web pages.

Stop Autoplay is an extension for Mozilla Firefox.

Recover lost passwords for Mozilla, SeaMonkey, Firefox and Thunderbird.

Bookmark management solution that integrates with Firefox and Internet Explorer

Lockfox is the popular browser Firefox security enhancements

Reduces the memory footprint of user-selected processes such as Firefox

Clear cookies from a single website or all browser cookies from IE or Firefox.

Clear all unwanted cookies from Internet Explorer or Firefox with a single click