Sure, people will almost definitely not call them "moz-colon-forward-slash-forwadslash-a", but I could easily see a lot of people shortening the whole thing to

Sure, people will almost definitely not call them "moz-colon-forward-slash-forwadslash-a", but I could easily see a lot of people shortening the whole thing to just Moz. The :// in a url acts as a separator, so the important bits are whatever come before and after it. All there is after it is an "a" which isn't very informative, so my eyes are drawn to "moz" instead. Which isn't ideal because a company named Moz already exists and has no connection to Mozilla whatsoever. Maybe less technical people who aren't used to seeing full urls won't have the same reaction, but in that case you've still got a problem because they probably won't already know who Mozilla is and it's kind of a leap to go from Moz://a to Mozilla without already knowing the name.