A good little piece of software. Easy to install, do one thing and doing it well.
About the punycode, look at https://www.xudongz.com/blog/2017/idn-phishing/ and don't forget to tweak "network.IDN_show_punycode" in about:config (set it to true) and do the test again.

The only extension that make possible to detect which web site is hi-jacked by the my company's proxy