i use an extension called OhMyECH to show whether a website used ECH, and it is currently very rare that i encounter one that does.
at least none of the major websites on the internet do.
at least none of the major websites on the internet do.
To get ECH to work for me I had to enable DoH in my local Unbound DNS daemon and point Firefox to it rather than using unencrypted DNS on my LAN. I had to force a refresh (shift-F5 on tls-ech.dev). I only use my own recursive DNS so I get query logs and can block some ad/malware sites.
[1] - https://crypto.cloudflare.com/cdn-cgi/trace
[2] - https://tls-ech.dev/