Domi

Can you try installing it through Heroic? https://heroicgameslauncher.com/

I don’t have F.E.A.R. 2 on GOG but I played it on Steam back when Proton was new and I didn’t have any problems with mouse buttons. I did install the Mousefix mod though to remove mouse acceleration.

I prefer a working Proton build over a untested broken native build. If you can’t afford the time to test the Linux builds, go ahead and just rely on Proton.

Testing on Steam Deck so it can be verified probably does make sense from a marketing standpoint though. Mostly checking that controls work, graphic settings are not too demanding by default and font scaling works properly.

This doesn’t make any sense to me either. Why do they need a license for what you type into Firefox if that data never gets shared with Mozilla?

I don’t know a single application that you need to give a license to so they can handle your data locally.