Safari on OS X Yosemite will mask most of a URL in its top-of-window address bar, following in the footsteps of Safari on iOS, and beating Google's Chrome, which is experimenting with the same design, to the desktop. While not strictly a trend, the decision by Apple to mask all but the domain -- say, nytimes.com or computerworld.com -- will bring a simmering discussion about the value of a full-string URL to the surface when customers first fire up Safari on Yosemite this fall.