Local translation is amazing, they just need to polish the settings.

Mint is amazing, but it isn’t the best gaming experience.

Yes, SteamOS is arch based, but the games run over steam runtime (wich is debian based) that’s why the steam-native package exists. I use endeavour btw.

FDM is open source? I thought they closed the code at some point.

Well if you use Firefox Nightly with ad-blockers and the latest version of Windows Defender the performance will be comparable to edge and chrome, the only thing is that Firefox uses the RAM that you are not using and that means if you have something open it will run slower.