Firefox 3.5 finally launched. We tested the release candidates and they were awesome. We definitely recommend upgrading. Be aware that some of your add-ons may not work, but they will either upgrade on their own, or you can most likely manually update them in the add-ons section of the Mozilla website.

The Fastest Firefox Yet

Things move quickly online, and we’ve beefed up the engine that runs Firefox to make sure you can keep up: Firefox 3.5 is more than twice as fast as Firefox 3, and ten times as fast as Firefox 2.* As a result, Web applications like email, photo sites and your favorite social networks will feel snappier and more responsive.

You can upgrade here