[KeplerBoy]

Well isn't that exactly what "supported" means?

It may or may not work, but since that is a bad user experience, they disable it.

[arghwhat]

"Not supported" on its own does not mean "actively blocked/disabled", which is what this is.

"Supported" means that they provide a certain effort for make the configuration operational for their users, by designing said support if needed and providing assistance as required.

[Dudhbbh3343]

That's a stupid reason to block a user. Just show a warning that your browser is not yet tested.