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>.
Ma yella asebter amiran ilaq ad yesεu anmahal n umeẓlu, tzemreḍ ad tqellbeḍ tuccḍiwin deg <a>tdiwent</a> neɣ ddu d usekles n unmahal-inek·inem n umeẓlu deg <span>umseɣti</span>.