On Weddnesday evening I switched on my desktop computer and was ligging into an on line drawing classsite which would give me access to a Class on Zoom when notification of an update for Firefox appeared on the screen. I think the message was that the update would be downloaded and then the computer would do a restart. I think the download occurred but not the restart. I was then logged onto the site and clicked to join the class. I was only on about 20 minutes as Zoom kept dropping outto the zoom login screen. After this happened about 5 times I gave up and switched the computer off. On Monday I logged onto aother zoom class via the came site and againthe Zoom class kept dropping me out to the login screen although a couple of times it went back in on its own. I have contacted the Zoom Help and seemed to be typing to a badly programmed AI robot and could not get it to understand I didn't want to know about setting up my mic and camera. Please be warned I'm retired and not good with electrons and IT speak etc.