Re: [ServiceWorker] Service-Worker-Allowed header (#604)

As a perhaps-unrelated issue, I a conversation I had with @metromoxie makes me think we should also add a special `none` or blank value to `Service-Worker-Allowed` to disable SWs entirely. Many users want a similar kill-switch.

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Reply to this email directly or view it on GitHub:
https://github.com/slightlyoff/ServiceWorker/issues/604#issuecomment-71103624