I RTFA first and couldn't get it working, came here and saw your comment and now know why it doesn't work. I may be a minority weirdo, but I have set dom.servi

I RTFA first and couldn't get it working, came here and saw your comment and now know why it doesn't work. I may be a minority weirdo, but I have set dom.serviceWorkers.enabled to false. Why? Because legit sites aren't broken by this and I always clear all browsers cache and databases on close (several times per day). IMHO service workers are used mostly for long-lived tracking, to supercede the cookie, and I also dislike background processing for things I just don't care about. So for me... service workers are disabled. They just don't work. And it turns out the web works just fine.