diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js
index 51624d393426..529d6554b595 100644
--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -739,6 +739,7 @@ pref("network.IDN.whitelist.kr", true);
 pref("network.IDN.whitelist.li", true);
 pref("network.IDN.whitelist.lt", true);
 pref("network.IDN.whitelist.no", true);
+pref("network.IDN.whitelist.nz", true);
 pref("network.IDN.whitelist.pl", true);
 pref("network.IDN.whitelist.pr", true);
 pref("network.IDN.whitelist.se", true);