A large part of Firefox browser popularity is generated by the large number of firefox add-ons, notably firefox extensions and themes, developed by the open community, which add amazing functionality to Firefox. The community at Spread Firefox is running a contest to an effort to promote the use of specific add-ons.
Firefox Add-ons Reviews Contest encourages you to write reviews about specific add-ons on your own blog or website, show off the cool and useful features and add a link to the add-on and another to download Firefox. Then you can post a comment to your link or submit the link to the list of reviews.
The contest will last for 2 months (starting Feb 1), after which the jury will pick the winners. Visit the Firefox Add-ons Reviews page at Squidoo and see the list of add-on reviews and promotion pages. Vote for the ones that you like most (login needed to vote).
I have a popular post about 50 best Firefox extensions which can give you an idea to write about.