From the wiki entry. > Normandy Pref Rollout is a feature that allows Mozilla to change the default value of a preference for a targeted set of users, without

From the wiki entry. > Normandy Pref Rollout is a feature that allows Mozilla to change the default value of a preference for a targeted set of users, without deploying an update to Firefox. Rolling out a new certificate goes beyond changing the default value of a preference which rightly raises questions about what else Normandy allows which is not documented.