fullscreen_frame.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<body>

  <iframe id="frameAllowed"

    src="https://example.org/browser/browser/base/content/test/fullscreen/fullscreen.html"

    allowfullscreen></iframe>

  <iframe id="frameDenied" src="https://example.org/browser/browser/base/content/test/fullscreen/fullscreen.html"></iframe>

</body>

</html>