diff --git a/user.js b/user.js
index 3b73c70..880ced6 100644
--- a/user.js
+++ b/user.js
@@ -49,6 +49,17 @@ user_pref("privacy.donottrackheader.enabled", true);
 user_pref("privacy.trackingprotection.enabled", true);
 user_pref("privacy.trackingprotection.socialtracking.enabled", true);
 user_pref("pdfjs.enableScripting", false);
+user_pref("browser.translation.engine", "");
+user_pref("gecko.handlerService.schemes.irc.0.name", "");
+user_pref("gecko.handlerService.schemes.irc.0.uriTemplate", "");
+user_pref("gecko.handlerService.schemes.ircs.0.name", "");
+user_pref("gecko.handlerService.schemes.ircs.0.uriTemplate", "");
+user_pref("gecko.handlerService.schemes.mailto.0.name", "");
+user_pref("gecko.handlerService.schemes.mailto.0.uriTemplate", "");
+user_pref("gecko.handlerService.schemes.mailto.1.name", "");
+user_pref("gecko.handlerService.schemes.mailto.1.uriTemplate", "");
+user_pref("identity.sync.tokenserver.uri", "");
+user_pref("media.decoder-doctor.new-issue-endpoint", "");
 
 // Telemetry
 user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);