[popup-inheritance-about-blank.html]
  [The fetch() API in an about:blank popup with the 'client' referrer is fetched with no 'Referer' header]
    expected: FAIL

  [The fetch() API in an about:blank popup with a custom URL referrer is fetched with a 'Referer` header that uses the outer document's URL along with its referrer policy]
    expected: FAIL

  [The value of document.referrer in an about:blank popup is the outer document's full URL, regardless of referrer policy]
    expected: FAIL

