I recently also had this same issue. Changing the view was a temp fix. The next time I opened Firefox, same issue. Found the problem to be with stumbleupon. The recent update to it was causing the overly large and blinking/refresh of Firefox. Uninstalled stumbleupon and the settings went back to normal.
Blake -- 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