Extend Firefox is a developer contest to encourage development and innovation in Web experience through add-ons to Firefox 2.

Will you be the brain behind the next great Web innovation? Do you have the drive to take your Firefox Add-on idea to the masses? Are you ready to affect everyday life for millions of people around the world?

Contest Overview

This edition of the Extend Firefox contest runs until December 31st, 2007. A panel of judges will award three Grand Prizes and twelve Runner-up Prizes based upon excellence in user experience, innovativeness, and use of open standards.

Here is the page from Firefox http://labs.mozilla.com/contests/extendfirefox/details.php