I am on firefox 72.0.1, windows 10 ver 1903 Ever since the last update, about once a day when I try to start firefox my curser starts flashing. After a few minutes my explorer.exe restarts and I will have about 50 copies of firefox to close. So now when it happens I try to open up task manager and kill the firefox.exe process but it doesn't do anything, the only thing to do is wait for explorer to crash and then close all the firefox windows. Next time this happens I will try restarting explorer.exe manually to see if I can stop it before it opens too many windows. I highly down this is an addon problem, been running the same 2 for years.