I just downloaded Firefox 4 Beta 10.
My impressions so far:
It has a Google Chrome look to it.
It still is a memory hog.
You can change the set up of the buttons and where the address bar is at the top. The default is terrible; I liked it the way it was.
The buttons are too big. I’m half-blind, but hell. Not that blind….yet!
They added paste and go; smart move.
I’ll post more, as I think of it.