> The Sec-Fetch-Site header can't be read / written by Javascipt
Perfect. It's not even meant or needed to be. The server uses it to validate the request came from the expected site.
As i and others have said in various comments, you seem to be lost. Nothing you're saying has any relevance to the topic at hand. And, in fact, is largely wrong.
"Nothing you're saying has any relevance to the topic at hand. And, in fact, is largely wrong."; your confidence in your opinion doesn't make you right.
Perfect. It's not even meant or needed to be. The server uses it to validate the request came from the expected site.
As i and others have said in various comments, you seem to be lost. Nothing you're saying has any relevance to the topic at hand. And, in fact, is largely wrong.