Firefox 3 had been released at 17 June 2008. It include a lot of cool new festures. You can easily find and install new addons in Firefox 3.
I am sure most of the Firefox users will install some addons or themes. But, do you know that Firefox 3 allow users to search addons within the Addons Manager?
As you can see in the screenshot, You can browse to the Get Add-ons tab and Firefox will show some recommended addons. There is also a searchbox so that you can search your favorite addons. The searchbox allow you to search for both extensions and themes. I am not sure whether you can search plugins or not.
Kudos to the team for making this add-on search possible.
I have just downloaded firefox 3 an hour ago.Hope it works good for me.