Robert in CA wrote:
The 8500 hung up again and I had to power it off which
took an unusually long time this time. It said I had (2) FF
open and I had to close the one to open the other and opened
Task Mgr to close FF but the pop-up kept appearing. I then
tried to restart it but a dialog box appeared to let the application
continue, shutdown etc and I clicked shutdown but it just kept
in a loop. So I elected to power it off and had a normal boot
along with the abnormal shutdown screen I was glad to see
but it shouldn't be hanging up at all at this point.

Robert

Are you running Firefox 89 or Firefox 88 or so ?

Next time, leave Task Manager open, have the memory column
in details, so you can see if Firefox is leaking memory
and using up all the memory on the machine.

Paul