--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -2263,17 +2263,17 @@ pref("browser.urlbar.clickSelectsAll", f
 pref("autocomplete.grab_during_popup", true);
 pref("autocomplete.ungrab_during_mode_switch", true);
 
 // Default to using the system filepicker if possible, but allow
 // toggling to use the XUL filepicker
 pref("ui.allow_platform_file_picker", true);
 
 // should NetworkManager be authoritative for online/offline status?
-pref("toolkit.networkmanager.disable", false);
+pref("toolkit.networkmanager.disable", true);
 
 pref("helpers.global_mime_types_file", "/etc/mime.types");
 pref("helpers.global_mailcap_file", "/etc/mailcap");
 pref("helpers.private_mime_types_file", "~/.mime.types");
 pref("helpers.private_mailcap_file", "~/.mailcap");
 pref("java.global_java_version_file", "/etc/.java/versions");
 pref("java.private_java_version_file", "~/.java/versions");
 pref("java.default_java_location_solaris", "/usr/j2se");