diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index d36d6a87ca..bb40db36aa 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -28,7 +28,7 @@ pref("general.useragent.compatMode.firefox", false);
 pref("general.useragent.compatMode.version", "102.0");
 pref("general.useragent.appVersionIsBuildID", false);
 pref("general.useragent.change_platform_version", true);
-pref("general.useragent.platform_version", "6.6");
+pref("general.useragent.platform_version", "6.7");
 
 // In order to disable all overrides by default, don't initialize
 // UserAgentOverrides.jsm.