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

firefoxuser25
Making moves

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

2 REPLIES 2

Masoncarter
Making moves

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.

lintaglenn
Making moves

@firefoxuser25 wrote:

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


I also have the same question because I recently started noticing similar strange behaviour in Firefox when entering fullscreen mode for WebGL games. The overlay effect makes it look like something on the page is still selected or highlighted, even though there is no way to click away or remove it while the game is running. It is especially distracting during fullscreen gameplay because it stays visible over the content and makes the whole experience feel broken.

I’m also wondering if this is related to a recent Firefox update, graphics acceleration settings, or how fullscreen mode is being handled with WebGL. I have seen similar issues across different websites rather than just one specific game, so it seems like it could be a browser-level problem. If anyone has found a workaround, such as changing a setting, disabling hardware acceleration, or using a specific Firefox configuration option, I would appreciate knowing because I’m experiencing the same issue and would like to get fullscreen gaming working normally again.