''locking this thread as duplicate, please continue at [https://support.mozilla.org/questions/1100596/ /questions/1100596/]'' Firefox is not responding so I've tried to force quit it through the force quit window, the dock, and activity manager but none have worked. Also, Firefox isn't opened and won't open so I can't troubleshoot through safe mode. I've also tried restarting my computer but it won't restart unless Firefox is closed.