diff -up comm-esr31/mail/app/profile/all-thunderbird.js.addons comm-esr31/mail/app/profile/all-thunderbird.js

--- comm-esr31/mail/app/profile/all-thunderbird.js.addons	2014-07-18 02:04:05.000000000 +0200

+++ comm-esr31/mail/app/profile/all-thunderbird.js	2014-07-29 15:29:11.949728141 +0200

@@ -174,7 +174,8 @@ pref("extensions.update.autoUpdateDefaul

 // Disable add-ons installed into the shared user and shared system areas by

 // default. This does not include the application directory. See the SCOPE

 // constants in AddonManager.jsm for values to use here

-pref("extensions.autoDisableScopes", 15);

+pref("extensions.autoDisableScopes", 0);

+pref("extensions.showMismatchUI", false);

 // Preferences for AMO integration

 pref("extensions.getAddons.cache.enabled", true);