High Quality Content by WIKIPEDIA articles! Netscape Navigator was a proprietary web browser. It was the flagship product of the Netscape Communications Corporation and was the dominant web browser in terms of usage share in the 1990s, although by 2002 its usage had almost disappeared. This was primarily due to the increased usage of Microsoft`s Internet Explorer web browser software, and partly because the Netscape Corporation (later purchased by AOL) did not sustain Netscape Navigator`s technical innovation after the late 1990s.