I fear not. With http3 enabled, the auto-updater never returns a result. It keeps saying "checking...". Looks like the auto-updater itself will work only when h

I fear not. With http3 enabled, the auto-updater never returns a result. It keeps saying "checking...". Looks like the auto-updater itself will work only when http3 is disabled through about:config which non-technical people may not be able to do. However I do recall Mozilla having another backdoor channel which they used sometime ago to push an emergency update. I hope that works.