Another good thing: It no longer pops windows up too low, such that the bottom of thewindow is behind the dock.
Bad thing: It’s still slow and locks up now and then. So far it’s not so bad like FF 2 was, but it’s not great.
So, it’s actually an upgrade in my view, so far with no real downsides to the transition. That’s very nice, and I congratulate the Firefox developers for managing that.