https://blog.wongcw.com/2018/10/10/firefox-beta%e5%8a%a0%e9%80%9f%e4%ba%86javascript%e5%92%8cwebassembly%e4%b9%8b%e9%97%b4%e7%9a%84%e4%bb%a3%e7%a0%81%e8%b0%83%e7%94%a8/