diff --git a/README.md b/README.md
index c0a1ccb6..b22df745 100644
--- a/README.md
+++ b/README.md
@@ -388,6 +388,7 @@ This section tweaks the cipher suites used by Firefox. The idea is to support on
 * Enable ChaCha20 and Poly1305 (Firefox >= 47) [ [1](https://www.mozilla.org/en-US/firefox/47.0/releasenotes/) [2](https://tools.ietf.org/html/rfc7905) [3](https://bugzilla.mozilla.org/show_bug.cgi?id=917571) [4](https://bugzilla.mozilla.org/show_bug.cgi?id=1247860) [5](https://cr.yp.to/chacha.html) ]
 * Disable ciphers susceptible to the logjam attack [ [1](https://weakdh.org/) ]
 * Disable ciphers with DSA (max 1024 bits)
+* Enable X25519Kyber768Draft00 (post-quantum key exchange) [FF Nightly 2024-01-18+] [ [1](https://datatracker.ietf.org/doc/draft-tls-westerbaan-xyber768d00/) [2](https://twitter.com/bwesterb/status/1748017372764475519) [3](https://pq.cloudflareresearch.com/) ]
 <!-- END SECTION -->
 
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diff --git a/user.js b/user.js
index 268daea7..497927cf 100644
--- a/user.js
+++ b/user.js
@@ -1240,3 +1240,9 @@ user_pref("security.ssl3.dhe_dss_camellia_256_sha",		false);
 //user_pref("security.ssl3.rsa_aes_128_sha",			false); // 0x2f
 //user_pref("security.ssl3.ecdhe_rsa_aes_256_sha",		false); // 0xc014
 //user_pref("security.ssl3.ecdhe_ecdsa_aes_256_sha",		false); // 0xc00a
+
+// PREF: Enable X25519Kyber768Draft00 (post-quantum key exchange) [FF Nightly 2024-01-18+]
+// https://datatracker.ietf.org/doc/draft-tls-westerbaan-xyber768d00/
+// https://twitter.com/bwesterb/status/1748017372764475519
+// https://pq.cloudflareresearch.com/
+user_pref("security.tls.enable_kyber",				true);