(Also posted this in the other thread: https://news.ycombinator.com/item?id=44170351 https://news.ycombinator.com/item?id=44170351) There is a specification fo

(Also posted this in the other thread: https://news.ycombinator.com/item?id=44170351 https://news.ycombinator.com/item?id=44170351) There is a specification for blocking this: https://wicg.github.io/private-network-access/ https://wicg.github.io/private-network-access/ It gained support from WebKit: https://github.com/WebKit/standards-positions/issues/163 https://github.com/WebKit/standards-positions/issues/163 …and Mozilla: https://github.com/mozilla/standards-positions/issues/143 https://github.com/mozilla/standards-positions/issues/143 …and it was trialled in Blink: https://developer.chrome.com/blog/private-network-access-update/ https://developer.chrome.com/blog/private-network-access-upd... Unfortunately, it’s now on hold due to compatibility problems: https://developer.chrome.com/blog/pna-on-hold https://developer.chrome.com/blog/pna-on-hold