Doesn't detect on Outlook?

[Eric Lawrence]

outlook.live.com/mail uses a ServiceWorker (as seen in the DevTools Application tab) but doesn't light up the detector icon?

[Thomas Steiner]

Have you reloaded the page at least twice? Soft-reloaded that is, as a hard-reload won’t work. On mobile now, can’t test myself.

[Eric Lawrence]

Ah. Reloading the page again made it appear. I guess that's expected?

[Thomas Steiner]

Yes, the Service Worker will only be active upon repeat visits. Working as intended :-D