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.

Someone just reported that it looks like a load balancer issue. Presumably, if that's the case it can also be fixed without user action: https://bugzilla.mozilla.org/show_bug.cgi?id=1749908#c17

I hope i am mistaken, but the auto-updater of my own FF was blocked.

There is something about being unable to check for updates if you open the console on any site...

Exactly what I was thinking. I hope they thought about this case and made the updater use a different stack...

Auto-Update doesn't work anymore. It's the first thing I tried when encounter this issue like 20 minutes ago.

Can't access any website or making any connection without disable `network.http.http3.enabled` and restart.

This impact is huge for million of firefox users!

Good. Abusing the users for testing via forced auto updates is short sighted and hopefully enough people change browser that Mozilla change their ways.

Several non techie friends already contacted me about a broken FF. There will be millions of people with this problem, indeed.

I can confirm auto-updater got broken too. When I realized my browser (nightly) was borked, first instinct was to update.. but nope, that didn't work. Then I manually downloaded a new nightly tarball, but that also didn't help. Switched to stable (95.0.2) and that worked once, then it got borked too.

Was blocked on my machine too, but spontaneously started working again after a complete reboot without the disable http3 fix, so there is hope! :D