In my opinion, Firefox is trying to do things that it should not do. That explains issues that we get with weird behaviors sometimes. Like it is not the role of

In my opinion, Firefox is trying to do things that it should not do. That explains issues that we get with weird behaviors sometimes. Like it is not the role of FF to mess with DNS TTL, that should only be the system resolver to decide if the request has to really be done or the cache used for DNS. In the same way, it looks ridiculous to me that in the http3, Firefox will silently target a different port than the one that is requested and displayed...