Block sending Referrer information

to improve user privacy (like the other Things webrtc, Hyperlink, csp...)

for Firefox (about:config) Normal Modus: network.http.referer.defaultPolicy (Standard = 3) Private Modus: network.http.referer.defaultPolicy.pbmode (Standard = 2)

From version 53 onwards, Gecko has a pref available in about:config to allow users to set their default Referrer-Policy— network.http.referer.userControlPolicy. From version 59 onwards (See #587523), this has been replaced by network.http.referer.defaultPolicy and network.http.referer.defaultPolicy.pbmode. -> https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy

Chrome etc i dont know.

greetings