diff --git a/root/usr/share/mozilla-mcd/firefox.php b/root/usr/share/mozilla-mcd/firefox.php
index 93aad45..2dbe4f3 100644
--- a/root/usr/share/mozilla-mcd/firefox.php
+++ b/root/usr/share/mozilla-mcd/firefox.php
@@ -39,6 +39,9 @@ else {
 }
 ?>
 
+// Load Services.jsm, might be usefull
+Components.utils.import("resource://gre/modules/Services.jsm");
+
 // Disable auto updates
 <?php echo $pref;?>("app.update.enabled", false);
 <?php echo $pref;?>("app.update.auto", false);
@@ -67,10 +70,6 @@ if ($pref == 'defaultPref'){
 // Do not check for default browser
 <?php echo $pref;?>("browser.shell.checkDefaultBrowser", false);
 
-// Disable popup blocker
-// not that very useful anymore, and blocks legitim popups from SOGo
-<?php echo $pref;?>("dom.disable_open_during_load", false);
-
 // Block 3rd party cookies
 <?php echo $pref;?>("network.cookie.cookieBehavior", 1);