Firefox 3 beta 3 is top notch February 12, 2008
I had beta 2 installed for a while, and scrolling certain websites was a bit slow. Today the update was released, and it's a whole new browser. It looks a lot different, it's fast, and the last thing I have to check is if it stops working after a while like beta 2 did. But I mean, a while as in a few days. Check out the release notes here.