Note that today in Chromium-based browsers this does _not_ take a page completely offline - it only affects some specific internal HTTP request APIs, so it's st

Note that today in Chromium-based browsers this does _not_ take a page completely offline - it only affects some specific internal HTTP request APIs, so it's still quite possible to exfiltrate data. For example, WebSockets & WebRTC aren't affected: https://bugs.chromium.org/p/chromium/issues/detail?id=423246 https://bugs.chromium.org/p/chromium/issues/detail?id=423246 (although it looks like there's work to start to properly support this in progress).