Can we disable the (video site) is in full screen mode box?

Hi,

The people who answer questions here, for the most part, are other users volunteering their time (like me), not Mozilla employees or developers. When a Mozilla employee jumps into a discussion, you'll see the Mozilla Staff label next to their name.

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You can also file a bug report or feature request. See File a bug report or feature request for Mozilla products for details.

You can adjust its setting in config editor, see support.mozilla.org/questions/1135503

It also briefly touches the security function behind it still being present (might be unnecessary for your cable provider video site; but the same API functionality is available also to spoofy scammy fake big tech lookalikes sent to people in phishing mail or text notifications etc. ending up on pages trying to force users into clicking things and calling phone number without allowing them to do anything else etc. so this is most likely not going away anytime soon) — if you're interested more in the security angle you can check the MDN intro developer.mozilla.org/docs/Web/API/Fullscreen_API/Guide and follow the standards linked from there for further gesture/interaction triggers and why these measures for clickjacking protections even then.