A guide on how you can enable ECH and HTTP/3 in Firefox and enjoy better DNS query encryption, TLS handshake encryption privacy and performance.

Firefox hides ECH behind some preferences because it is still a work in progress. Nevertheless, it's mature enough to enable.
On Mobile, you can use Beta or Nightly in order to access **about:config**.

ECH is enabled by setting ***network.dns.echconfig.enabled*** to ***true***, ***network.dns.http3.echconfig.enabled*** to ***true*** and ***network.trr.mode*** ***3***.

Now by checking https://www.cloudflare.com/ssl/encrypted-sni/ the test should return true to **Secure DNS**, **DNSSEC**, **TLS 1.3** and **Secure SNI**.

and by checking
https://cloudflare-quic.com/ the test should report: *When loading this page from Cloudflare's edge …

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