Hello, I have a problem. When I click firefox icon, new process starts (due to the task manager) but no UI is shown. I've already tried everything from https://support.mozilla.org/en-US/kb/firefox-wont-start-find-solutions but nothing works. Safe mode does not work. Profile manager does not work (the same problem). I have also uninstalled firefox, deleted C:\Program Files (x86)\Mozilla Firefox and %APPDATA%\Mozilla and then installed Firefox again, but the issue stil persists.