Actually, Fennec's quite a few good ideas, expecially for Firefox users. I mean, it can syncs your open tabs (the ones you left open at home before leaving!), bookmarks, search history and site access infos (so you won't type those old pass/user you can't even remember).
Moreover, you get plugins... not a big amount of them available, but this could just a matter of time if this catches up; and tab management is on par with Android browser's.
Main downside is related to page render speed and program open, they just fail before Android stock browser (which I think is quite awesome, I have to admit it, in terms of performances and compatibility).
Definitively still a "to keep an eye on" project, though.