https://blog.wongcw.com/2020/01/12/firefox-%e6%89%93%e5%8c%85%e5%a4%aa%e8%a4%87%e9%9b%9copenbsd-%e7%a9%a9%e5%ae%9a%e7%89%88%e5%b0%87%e4%b8%8d%e5%86%8d%e6%8e%a5%e6%94%b6%e5%85%b6%e6%9b%b4%e6%96%b0/