Add-ons or extensions are small pieces of software that can add new features or tiny tweaks to your browser. They can add niche search engines, change the look of your browser tool bar, block annoying pop-ups, preview links, organise your browsing history and do much more.
Mozilla Corp, which recently set a world record with Firefox 3, recently held its annual competition that recognises the year's best Firefox add-ons.
This year's contest focused on add-ons that took advantage of its latest open-source browser Firefox 3. Here's listing what Mozilla crowned best Firefox add-ons.