Just noticed this today and was wondering if it was something Normalize was capable of addressing, and if so (and perhaps more importantly) SHOULD it address it. This is probably not a big deal but I noticed it was inconsistent across the browsers so I thought I'd bring it up.
Here's an example of what I mean. I blew up the font-size of a long URL so that it would fill your screen.
http://codepen.io/jimmykup/full/JzrAw
In Firefox and Opera the URL breaks the URL at the slashes. However, Webkit and IE don't break the URL at all unless you throw a hyphen in there (and perhaps other characters).
Just thinking out loud!