diff --git a/user.js b/user.js
index c21573c..836a196 100644
--- a/user.js
+++ b/user.js
@@ -17,6 +17,8 @@ user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
 user_pref("toolkit.crashreporter.infoURL", "");
 
 // Data reporting
+user_pref("datareporting.dau.cachedUsageProfileGroupID", "");
+user_pref("datareporting.dau.cachedUsageProfileID", "");
 user_pref("datareporting.healthreport.infoURL", "");
 user_pref("datareporting.healthreport.uploadEnabled", false);
 user_pref("datareporting.policy.dataSubmissionEnabled", false);