Same. MBP2018/FF65. Hard reboot needed to get back up. Interestingly when it soft-crashed FF had a dangling process which wouldn't let it me open the app again

Same. MBP2018/FF65. Hard reboot needed to get back up. Interestingly when it soft-crashed FF had a dangling process which wouldn't let it me open the app again (~"Only one FF can be running"). Guess I was well overdue for a reboot anyway...