<!DOCTYPE html>
<script>
  navigator.serviceWorker.getRegistration(".").then(function(registration) {
    registration.unregister().then(function(success) {
      if (success) {
        window.parent.postMessage({status: "unregistrationdone"}, "*");
      }
    }, function(e) {
      dump("Unregistering the SW failed with " + e + "\n");
    });
  });
</script>
