I just downloaded the update ,and I haven’t had much time to try it out. What I can say is it finally supports portrait mode, loads up much faster than it did before. It still doesn’t have portrait keyboard support like opera mobile does, but this version is definitely better than the previous one. All said and done, MicroB will remain my default browser until something much better comes up, but if you want to try Firefox out, you can head to Firefox.com/m or Firefox.com/m/beta on your N900. There are a couple of screen shots attached. Check em out..