I don’t know what brand my silicone cover is, but it looks exactly like this one, and it fits inside the case that came with my steam deck

Try setting firefox to your default browser. That made it work for me.

I like to use pads as a substitute for a mouse. Games like peggle, zuma, and mini metro are great with the pads. I also like to use the pads with gyro to aim in first person games. Portal is a good game to ease into that.

I think gta 5 does