diff --git a/README.md b/README.md
index 9b2dd8d..84d9ae7 100644
--- a/README.md
+++ b/README.md
@@ -254,6 +254,8 @@ If you have troubles with some sites being proxied, you can play with flags valu
 
 If you are on Chromium you may have to disable *kyber* (the feature that makes the TLS *ClientHello* very big). I've got the problem with it on router, so to escape possible errors, so it is better to disable it: in `chrome://flags` search for kyber and switch it to disabled state. Alternatively you may set `--sni-detection=brute` and probably adjust `--sni-domains` flag.
 
+*Kyber* on firefox disables with `security.tls.enable_kyber` in `about:config`.
+
 If your browser is using QUIC it may not work properly. Disable it in Chrome in `chrome://flags` and in Firefox `network.http.http{2,3}.enable(d)` in `about:config` option.
 
 It seems like some TSPUs started to block wrongseq packets, so you should play around with faking strategies. I personally recommend to start with `md5sum` faking strategy.