Failed .onion gets rewritten/redirected to https in Firefox 78
In current Firefox 78 beta, when loading a random (wrong) .onion URL (e.g. foobar.onion) it gets redirected and/or rewritten to https://. In Browser Console, both requests (http:// and then https://) appear.
This happens in 78 beta, setting a Tor SOCKS5 proxy + enabling DNS proxying, so it does not seem caused by one of our patches.