They don't need to remove the ability to override - they just need to remove it from the preference panel. As long as it is still available as a configuration c

They don't need to remove the ability to override - they just need to remove it from the preference panel. As long as it is still available as a configuration change though an about:config screen or equivalent - admins in specialized environments can set it appropriately. In fact - they are more likely to set it through a registry setting or a domain policy and would never go to the preference panel at all.