Confirmed here on i386, French locale LANG=C fixes the problem, but it's not a nice fix :) It looks like mozilla-firefox-locale-* weren't updated for beta2.
-- [edgy]Crash opening firefox https://launchpad.net/bugs/60631 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
