Disable Firefox Auto Update for Terminal Servers

Disable the auto-update feature in Firefox.

I accomplished this by first creating a file called mozilla.cfg in the C:\Program Files\Mozilla Firefox directory with the following contents:

// Disable Auto Updates
lockPref(”app.update.enabled”, false);
lockPref(”extensions.update.enabled”, false);

Those instruct Firefox to disable the auto update for the browser itself AND any add-in extensions.

Also you must edit C:\Program Files\Mozilla Firefox\greprefs edit the file all.js and add this to the bottom:

// Process mozilla.cfg in FireFox root directory.
pref(”general.config.obscure_value”, 0);
pref(”general.config.filename”, “mozilla.cfg”);

Without that last piece, Firefox won’t process the mozilla.cfg you created.

No reboot needed, and hopefully you’ll never run into this again.