tion")[0].redirectCount and the
           window.performance.getEntriesByType("navigation")[0].redirectStart/End times for a cross-origin server side redirect navigation when the redirect chooses to opt-in.</p>

        <iframe id="frameContext" src="" style="width: 250px; height: 250px;"></iframe>
        <script>
            // combine the page origin and redirect origin into the IFRAME's src URL
            const destUrl_first = make_absolute_url({subdomain: "www",
                                      