I would like to block selected websites from being able to install service workers or disable the ability to install service workers at all.
How can I do that ?
In Chrome there is no built-in flag to disable service workers specifically. But service workers count as "cookies/site data" at chrome://settings/cookies so blocking those disables service worker.
Source: https://groups.google.com/a/chromium.org/forum/#!topic/service-worker-discuss/Cohd-TKG8so