Service Worker Killer

service-worker-killer.user.js

// ==UserScript==
// @name         Service Worker Killer
// @version      0.4.0
// @description  Unregister ServiceWorker(s) before page unload
// @author       Gavin Lloyd <[email protected]>
// @match        http://*/*
// @match        https://*/*
// @grant        none
// ==/UserScript==

(() => {
  window.addEventListener('beforeunload', () => {
    navigator.serviceWorker.getRegistrations().then(serviceWorkers => {
      serviceWorkers.forEach(serviceWorker => serviceWorker.unregister());
    });
  });
})();