Bug when playing games in full screen - overlay of the color of selection for instance blue

[firefoxuser25]

Very recently Firefox started behaving weirdly when playing any game in fullscreen, webgl games I suppose, in full screen. On Facebook, on any website. When switching to fullscreen there is overlay, it behaves and looks like when you select something on a website, picture, text. Only when playing game you cannot select anything and also neither unselect it. Very annoying, hurts the viewing, hurts eyes. Please fix it. Thanks

[Masoncarter]

Yeah, missing Gamepad API support in Firefox definitely makes browser-side testing harder. When I’m checking controller input for Android-based game environments, tools like the Delta Executor Key help validate responsiveness—so proper support in Firefox would remove the need for extra workarounds. Hope they roll out full gamepad handling soon.