https://blog.wongcw.com/2021/03/23/firefox-87%e5%b0%87%e9%bb%98%e8%aa%8d%e4%bf%ae%e5%89%aahttp-referrers%e4%bb%a5%e4%bf%9d%e8%ad%b7%e7%94%a8%e6%88%b6%e7%b2%89%e7%b5%b2/