I ran into the same question when writing our jest bindings - is it Jest.Fn.make(), Jest.fn() or jest.fn()?
My vote would go for Navigator.cookieEnabled. It has the same ergonomics but is namespaced nicer. As much as I like the direct navigator.cookieEnabled, when you need to add function bindings the former makes it more clear where you can look for those functions (i.e. Location.assign)