[Wilya]

Fun fact: In 1999, Mozilla (around its M11 release) introduced a "Search" button to the location field [0] which meant a unified input box. Firefox and its two-field setup is, absurdly enough, a later move. I can't point out when it happened, or if it was already there in the earliest days.. The single box is still there in Seamonkey, though, iirc.

[0] http://www.andrewturnbull.net/mozilla/history.html