diff --git a/user.js b/user.js
index 4edd620..85eec26 100644
--- a/user.js
+++ b/user.js
@@ -173,7 +173,7 @@ user_pref("extensions.webservice.discoverURL", "");
  * [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
 user_pref("toolkit.telemetry.unified", false);
 user_pref("toolkit.telemetry.enabled", false); // see [NOTE] above FF58+
-user_pref("toolkit.telemetry.server", "data:");
+user_pref("toolkit.telemetry.server", "data:,");
 user_pref("toolkit.telemetry.archive.enabled", false);
 user_pref("toolkit.telemetry.cachedClientID", "");
 user_pref("toolkit.telemetry.newProfilePing.enabled", false); // (FF55+)