https://blog.wongcw.com/2019/12/03/mozilla-firefox-browser-v71-0-x86-x64-win-mac-%e6%ad%a3%e5%bc%8f%e7%89%88-%e7%b0%a1%e9%ab%94%e4%b8%ad%e6%96%87-%e7%b9%81%e9%ab%94%e4%b8%ad%e6%96%87-%e8%8b%b1%e6%96%87/