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>.
Gaby aktualny bok service worker měł, mógał wy w <a>konsoli</a> za zmólkami pytaś abo pśez registraciju swójogo service worker w <span>pytanju za zmólkami</span> pśeběžaś.