펌글 : https://extrememanual.net/30014
민트리눅스에서 따라 해봤는데, 잘 안되네...쩝..
요약
install firefox
about:config
위험감수?OK
network.trr.bootstrapAddress : 1.1.1.1
network.trr.mode : 2
network.security.esni.enabled : true
restart
클라우드 플레어 접속확인(https://www.cloudflare.com/ssl/encrypted-sni/)