High Quality Content by WIKIPEDIA articles! Browser wars is a metaphorical term that refers to competitions for dominance in usage share in the web browser marketplace. The term is often used to denote two specific rivalries: the competition that saw Microsoft`s Internet Explorer replace Netscape`s Navigator as the dominant browser during the late 1990s and the erosion of Internet Explorer`s market share since 2003 by a collection of emerging browsers including Mozilla Firefox, Google Chrome, Safari, and Opera.