It's not just the user interface, it's that (for example) they don't QUITE completely ignore mac (emacs) keybindings (e.g. ctrl-a should move to beginning of PARAGRAPH, but either moves to the beginning of the visual line in the textbox, or highlights whatever you've searched for if you're that unlikely). This is far worse behavior, and it's been like this for years!

Yes! Thank you. While I don't think it looks or feels perfect yet, it at least shows that FF is still in the game working on things like this.

That's hardly a good Mac UI. On the Mac:

1. Tab close buttons should be on the left, not the right.

2. They got the tab title right, in the center, but site icon should be right next to the site title, not on the far left.

Be aware that the UX alpha is highly unstable. Many things are not finished and from time to time just appear and vanish out of thin air.

So it can only be used as a direction indicator and as such, I think it looks good.

Actually this tab style dates back to at least Firefox 3. I didn't check further back. It looks like XUL can't do it the right way, and they don't care enough to do it right.

It seems like sometimes the play with it and go back to the old one (which I actually like...).

BTW, the UX alpha is back to the old style.

I think the reason they have the icon/close button switched is because when you pin a tab it goes on the left side of the screen.

Oh, interesting. That's what Thunderbird looks like now. I was just noticing the other day that Thunderbird got really nice looking suddenly...

That rounded tab just looks off to me. Everything else looks great though.