I run CCleaner after closing Firefox. It often tells me Firefox is still running and can’t clean. A min or two later I can run CCleaner.
I can count on Firefox hanging at least once a week. After 5 mins I give the three finger salute. Task Manager reveals that it is a plug-in container that’s screwing things up. Kill that container and Firefox stops.
I’ve learned the hard way never to keep Firefox open more than a few hours. If its kept open a day or two then all my memory is eaten up. My system gets really slow. It always hangs when I try to close and requires killing in task manager. Firefox hates being left open very long.
I’m not sure if this is normal? Could a virus be lurking in that plug in container that keeps hanging things up?