Same problem I have to press F11 to go really in "full screen" then i press a new time F11 and i can see the Ubuntu main menu. Another solution, reinstall Firefox.
Cordialement Francis >From France -- firefox "blinks" black & removes main menu / task bar at top of Ubuntu desktop screen https://bugs.launchpad.net/bugs/230485 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