After restarting my computer (and firefox presumably updating), I have trouble accessing almost all websites. One of the few that somehow works it this: http://stephenm.org/smfforum/ Chrome has no problem at all accessing any websites. I have tried deactivating my antivirus and my firewall to no effect. When Firefox fails to load the website just a blank screen appears, no error message. Sometimes it says 'Failed to load secure connection', but not with all https websites and not always. Safe mode didn't help. I am trying to download Firefox 65.0.2 to see if it was the update that broke stuff - it also happened on my other computer, exactly the same errors and symptoms.