o a policy of trimming a referrer to convey less tracking information, but Referer continues to convey cross-site tracking data by default.</span></div></td><td><div class='dataPoint tooltipParent bad'
> &nbsp;
<span class="tooltipText">write: (secret) => { /* do nothing */ }

read: () => new Promise((resolve) => {
      parent.postMessage({"read document.referrer": true}, "*");
      addEventListener("message", ({data}) => {
        resolve(data);
      }, { once: true });
    })

result, same first party: