The usb feature controls whether the current document is allowed to use the WebUSB API.
If disabled in a document, then calls to the
should return a promise which rejects with a SecurityError DOMException.
How to apply this policy
Send the following HTTP header to control the
usb policy, and disallow it on
Feature-Policy: usb '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
usb policy is: