Mint 22 is set to include the Thunderbird DEB package…
Yes, they did. I’m using Mint 21.2 Xfce with Pipewire “factory” installed.
In my experience, Firefox and forks are never super fast. Installed Floorp Lightning and the speed is the same as Firefox.
I’m a complete noob in the games department. Btw, I see that you don’t use Arch.