If this is about giving the user's more control over what they see: then the setting should not be hidden in about:config, full stop. I know this may be lost on the HN crowd, but doing that relegates the functionality to a small fraction of power-users.
You know what, I think we agree! That's two votes for "move some stuff out of top-secret about:config and into Settings where the mortals can actually use it, it's useful for them."
You know what, I think we agree! That's two votes for "move some stuff out of top-secret about:config and into Settings where the mortals can actually use it, it's useful for them."