Did it appear just after an upgrade ? We have a desktop notification asking users to restart firefox when it has been upgraded.
-- Tiny firefox window at top-left of screen https://bugs.launchpad.net/bugs/210241 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
