Firefox had an update today, so I clicked the update button. When I launched it again it: - won't load any webpages. It doesn't even try to load pages. - I can't even load about:support - won't open settings from the menu - won't open the add-ons so I can't try disabling any extensions. - It won't launch it troubleshoot mode I've uninstalled, rebooted my machine, installed Firefox again and the above behavior still happens. The "about firefox" still works and says I have the latest version: 91.0.1 Any thoughts on what I should try next?