Web Serial API on Chromiun/FreeBSD
test site
https://googlechromelabs.github.io/serial-terminal/
at macOS
https://gyazo.com/469c8f27d14b911aab661f516c7a073a
https://gyazo.com/9a2f63814b831d96261e8fc84c3441c0
at FreeBSD amd64
https://gyazo.com/e232aad0877abfc164720d3b76e5a3c2