Backed out changeset 23a3b1b5a2b7 (bug 1816538) for causing Bug 1835822, Bug...

  // Start the listener right away to avoid race conditions.

  const listener = new ProgressListener(webProgress, {

    resolveWhenStarted,

    // For initial navigations, we should consistently get a navigation so we

    // use a much higher unload timeout compared to the default value.

    // See Bug 1816538.

    unloadTimeout: 5000,

  });

  const navigated = listener.start();