It sounds possible but pretty limited in usefulness. Almost all cookie usage is session tokens and tracking tokens. There is no point syncing these. I suppose

It sounds possible but pretty limited in usefulness. Almost all cookie usage is session tokens and tracking tokens. There is no point syncing these. I suppose you could sync locally stored preference data but this is pretty uncommon since you could just store the data with your account. Would just be adding more complexity to the browser for a feature that very few would use properly, and likely many would abuse.