Cons: I don't like the new status bar, and the bookmark manager appears to have disappeared.
Pros: I like the tabs on top, and random hiccups that were occurring on OSX appear to be down. Personas are fully working now with the title bar in OSX.
Note: I'm just taking a break from Firefox 3, but I'll probably be switching back for addon support such as a fully working copy of Firebug and Greasemonkey. I haven't spent enough time to notice speed increases, and I haven't tested it.
Recommendation: disable the 'addons bar' (status bar) - it probably only showed up because you kept your old profile. Also, you might have to add the bookmarks button back to the toolbar if you migrated your profile as well (it still exists!)
Pros: I like the tabs on top, and random hiccups that were occurring on OSX appear to be down. Personas are fully working now with the title bar in OSX.
Note: I'm just taking a break from Firefox 3, but I'll probably be switching back for addon support such as a fully working copy of Firebug and Greasemonkey. I haven't spent enough time to notice speed increases, and I haven't tested it.
What are everyone else's thoughts?