Evidently I had an "update" today and at first it was working, but incredibly sluggishly - several seconds between screens. Then it started randomly freezing and crashing. I tried various ways to uninstall the program, but nothing happens. I have refreshed and rebooted, without effect. I tried downloading Firefox again - nothing. None of the suggested "fixes" do anything. Sometimes I have to use the Windows task manager to close the program, sometimes not. Sometimes I get a "Firefox has stopped working" error message, sometimes not. As far as I can tell, the rest of the programs on my computer are functioning normally. Please help! (I will be off line for about the next ten hours.)

Incidentally, when I clicked on the "automatically add" troubleshooting information button on this "ask your question" page, the page crashed.