Letterboxing doesn't work when fullscreening videos (it covers exactly the whole screen)

added component::applications/tor browser owner::tbb-team priority::medium severity::normal status::new tbb-fingerprinting-resolution type::defect labels

Note: the full-screen API requires user interaction, and can already get your exact full-screen dimensions with or without a video.

Trac:
Keywords: N/A deleted, tbb-fingerprinting-resolution added

Here's an image element doing the same thing

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>FS Element</title>
<style>
body {background-color: white; color: black;}
</style>
</head>
<body>
<img id="image" width=0 height=0></img>
<button onClick="goFS()">click me to go full screen</button>
<script>
function goFS() {
	if (document.mozFullScreenEnabled) {
		let element = document.getElementById("image");
		element.mozRequestFullScreen();
	};
}
</script>
</body>
</html>

@gk .. should we close this as a duplicate of #12609 (moved) ? Note: we still have https://bugzilla.mozilla.org/show_bug.cgi?id=1450401 upstream

mentioned in issue #33479 (moved)

moved to tpo/applications/tor-browser#32713

mentioned in issue tpo/applications/tor-browser#33479

Letterboxing doesn't work when fullscreening videos (it covers exactly the whole screen)

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