Right off, Firefox 4 looks a bit like Google Chrome.
My home computer didn’t do what my work computer did when I upgraded to Firefox 4. My work computer When I upgraded to Firefox 4 all of the menu items in my browser disappeared. Lost my back button, lost my refresh button, Lost my home button, but all of that was restored by going into view, toolbars, customize. I then brought everything back. Could be because my work computer is Windows Xp and my home computer is Windows 7. My work computer also lost my Conduit toolbar while my Windows 7 computer at home did not.
After some usage, I really like the way the tabs move in Firefox 4 as you open and close them. The look of Firefox 4 stops looking so much like Google chrome and more traditional Firefox.and it seems to fix the crashing I was seeing on twitter when I used the older version of firefox web browser.
Not a bad web browser.