I don't understand what this is referring to WRT Firefox. In Firefox I'm seeing the full URL right now, and have never not seen a full URL, and have never needed to configure anything. By "insanity" is this just referring to the way that Firefox renders the TLD and 2LD in black and the rest in gray? What about:config setting is this obliquely referencing?
EDIT: anyone care to explain the downvotes?