diff --git a/thunderbird-redhat-default-prefs.js b/thunderbird-redhat-default-prefs.js
index 81d3c78..e00e50e 100644
--- a/thunderbird-redhat-default-prefs.js
+++ b/thunderbird-redhat-default-prefs.js
@@ -5,6 +5,7 @@ pref("general.useragent.vendor", "Fedora");
 pref("general.useragent.vendorSub", "THUNDERBIRD_RPM_VR");
 pref("intl.locale.matchOS", true);
 pref("mail.shell.checkDefaultClient", false);
+pref("toolkit.networkmanager.disable", false);
 
 # Make hyperlinks work
 pref("network.protocol-handler.app.http", "COMMAND");