diff --git a/Fastfox.js b/Fastfox.js
index a8f7ffa..c83ce19 100644
--- a/Fastfox.js
+++ b/Fastfox.js
@@ -418,8 +418,9 @@ user_pref("network.ssl_tokens_cache_capacity", 10240); // default=2048; more TLS
 // [2] https://css-tricks.com/prefetching-preloading-prebrowsing/#dns-prefetching
 // [3] https://www.keycdn.com/blog/resource-hints#2-dns-prefetching
 // [4] http://www.mecs-press.org/ijieeb/ijieeb-v7-n5/IJIEEB-V7-N5-2.pdf
+// [5] https://bugzilla.mozilla.org/show_bug.cgi?id=1596935
 user_pref("network.dns.disablePrefetch", true);
-//user_pref("network.dns.disablePrefetchFromHTTPS", true); // DEFAULT
+user_pref("network.dns.disablePrefetchFromHTTPS", true); // (FF127+ false)
 
 // PREF: enable <link rel="preconnect"> tag and Link: rel=preconnect response header handling
 //user_pref("network.preconnect", true); // DEFAULT