Page Comparison

<link rel="manifest" href="/manifest.json">

 <script>
    if ('serviceWorker' in navigator) {
      navigator.serviceWorker
        .register('/service-worker.js', { scope: '/' })
        .then(function (registration) {
          console.debug('Service Worker Registered');
        });
      navigator.serviceWorker.ready
        .then(function (registration) {
          console.debug('Service Worker Ready');
        });
    }
  </script>