If the current page should have a service worker, you could look for errors in the <a>Console</a> or step through your service worker registration in the <span>Debugger</span>.
Si le actual pagina deberea haber un obrero de servicio, tu pote dar un reguardo pro errores in le <a>Consola</a> o analysar tu registration de obreros de servicio in le <span>Depurator</span>.