Firefox Beta 2 is now available. I've been using Beta 1 for a few weeks now. It's been stable for a beta (testing) release. So far most extensions and themes haven't been updated to work with Firefox 2, so if you've got a beloved extension (like Sage for me), don't upgrade just yet. On the other hand, Firefox 2 does include built-in spell checking (a very nice feature for bloggers) and anti-phishing tools. It's easier to re-open recently closed tabs and they are doing a lot of work on Live Bookmarks (RSS/Atom feeds). I'm still not sold on the way Live Bookmarks are handled, but I'm willing to be converted.