WebKit currently implements the feature policy mechanism to allow
developers/sites to enabled/disable certain features and/or browser
APIs like geolocation or access to camera among others.
While implementing the WebXR API I realized that we are not exposing
the values of feature policies to the web. I was wondering whether that
was made on purpouse (fingerprinting?, privacy?...) or it is just
because the use cases were not considered relevant enough to implement
it. I haven't found any bug tracking that.