Is privacyguides wrong?

While the company has a questionable record and a controversial business model, Brave Browser is an open-source browser with good privacy features.

Steam Deck and Linux desktop user here.

I wouldn’t prioritize a native Linux binary if I were you. For some of my games that have a native Linux version, I still run the Proton compatibility version instead because it runs better. Proton is insanely well-optimized and adapted to Linux desktops, your own code will have a hard time competing with that.

Just make sure to pick an engine / tech stack that works well with Proton and find one or more testers who run SteamOS or another Linux distribution.