We then have AutoPKG automatically download the latest ESR and add the CCK autoconfig files to the app bundle before wrapping it up in a nice installer package that is then imported directly into Munki which makes my life very easy. With Firefox, we use the CCK to generate autoconfig files. This brought about a little challenge in that Google Chrome does not fully utilise MCX / Config profiles to control all of its settings, so its not quite as easy to manage as Safari. I had a request to add the Google Chrome web browser to our builds.