FireFox3b3

After having issues with Google and FF2, I decided to try 3b3. Having read that 2 was not very stable and not good on Flash, I tried b2 and watched it die a nasty death on Facebook and several Flash sites. b3 however seems to be running along fine and so far is not having any issues with Google apps (yet). Bummers? FF3b3 still does not close empty windows with cmd-w… they have the right interface finally, but what is with the windows?