I think it's faster. Odd how it could be, but things seem to load much faster. The tabs at the top kind of screwed me up. I don't like that the "home" button is all the way to the right, I haven't figured out how to move it yet. I liked it right next to the forward/back. I like that they combined the stop/reload button. I swear though that when you right-click on a link, to go to "open in new tab" is used to be below "open in new window", and now it's first. It should be, but I swear it wasn't before.
I have a Apple and I love the new Firefox on it. Only thing I wish I could do is put the bookmarks up above the tabs, might just be I haven't look into it enough to figure i out
still stumbling as well. Don't really like how the bookmarks don't show up on the tabs like they used to. and the home button took me a minute to find the first time.