Since the problem occured when using a 3rd party extension not available from the Ubuntu repositories, there isn't much the Ubuntu developers can do about it.
If the problem is reproducible I would recommend that you file a bug report directly with the authors of Adblock. ** Changed in: firefox (Ubuntu) Status: Unconfirmed => Rejected -- Crash when clicking on "Adblock" on lower panel https://launchpad.net/bugs/63342 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs