Browser wars: Metaphor, Web browser, Microsoft, Internet Explorer, Netscape, Netscape Navigator, Mozilla Firefox, Google Chrome, Safari (web browser), Opera (web browser), Usage share of web browsers

Browser wars is a metaphorical term that refers to competitions for dominance 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, Safari, Google Chrome, and Opera.