Should I Upgrade to Firefox 3?

Got Firefox installed and running under NitoTV but when I open it up, the option to upgrade Firefox appears. Should I upgrade from Firefox 2.2 to Firefox 3? Would anything break because of the upgrade or would there be any process improvements (ie. faster load times, better Flash supports, etc)?

You can upgrade, though the 2.x version will run a bit quicker on the AppleTV.