Using: Please check the network panel for requests.

• 1. Calls from webpage, honor the referrer policy.
• 2. Calls from worker do not.
• 3. Fetch API will honor the referrer policy, in worker if explicity passed with {referrer-policy:}.
• 4. Even if the user sets the pref: network.http.referer.userControlPolicy to 0 (), worker will still send the referrer with path of the page.
  This may leak some sensitive information.