diff --git a/mozilla/modules/libpref/src/init/all.js b/mozilla/modules/libpref/src/init/all.js
index b3c7a1549a4..3cebc5752dd 100644
--- a/mozilla/modules/libpref/src/init/all.js
+++ b/mozilla/modules/libpref/src/init/all.js
@@ -605,6 +605,7 @@ pref("network.IDN.whitelist.tw", true);
 pref("network.IDN.whitelist.vn", true);
 
 // non-ccTLDs
+pref("network.IDN.whitelist.cat", true);
 pref("network.IDN.whitelist.info", true);
 pref("network.IDN.whitelist.museum", true);
 pref("network.IDN.whitelist.org", true);