Clicking doesn't reveal the URL. You have to click and use the left arrow key, at which point the protocol and www prefix appear.

Just like when Chrome hid the protocol part of the URL, you can even click in the URL bar and copy it without seeing the protocol (or, now, www prefix) at all. I think it results in a confusing experience when you paste it. (Ordinary users will say: "I copied example.com but I pasted https://www.example.com … why??)