The fullscreen policy controls whether the
method is allowed to request fullscreen.
If disallowed in any document, the document will not be allowed to use fullscreen. Triggering full-screen mode can be a jarring experience for users, and can be exploited by content that would otherwise be confined to a small frame.
How to apply this policy
Send the following HTTP header to control the
fullscreen policy, and
disallow it on all origins:
Feature-Policy: fullscreen 'none'
Does it work?
Currently Firefox, and Chromium based browsers, such as Google Chrome, Samsung Internet,
and Opera, are the only user-agents to support Feature Policy. The minimum version that
correctly recognises the
fullscreen policy is: