Chromium controller config?

I didn’t even realize using controllers in browsers was a thing and I normally use Firefox but since Halo Infinite doesn’t work in Proton yet I figured I’d try the Xcloud service, which doesn’t really work in firefox. Anyway, I use an Xbox One Bluetooth controller and it all works fine except the Menu button is for whatever reason mapped to the browsers back button, so using it in game throws me out of the game.

Any idea how this can be reconfigured for Chromium? I can’t find anything.