In Firefox 3 the Add-on manager has been expanded to include a new “Get Add-ons” tab where you can view Recommended add-ons, search for new add-ons, see add-on descriptions and ratings, and install add-ons with a simple click. The Add-ons manager is now fully integrated with the addons.mozilla.org (AMO) website, making it easier than ever to find and experiment with new browser extensions and themes.
For more, see Get Add-ons in Firefox 3 by Madhava Enros.
