kernl API
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    Variable CONTROLLER_DENY_POLICYConst

    CONTROLLER_DENY_POLICY: "gamepad 'none'; hid 'none'; usb 'none'"

    The Permissions-Policy denyNappletControllerAccess sets, for frames that cannot report their own.

    frame.setAttribute('allow', CONTROLLER_DENY_POLICY); // "gamepad 'none'; hid 'none'; usb 'none'"