Mosaic Communications Corp. -- later renamed Netscape Communications Corp. -- releases the beta version of its Web browser, called Mosaic Netscape 0.9. It was based on the Mosaic code developed by the NCSA, and Mosaic co-author Marc Andreessen was a co-founder of Netscape. The browser was later renamed Netscape Navigator. Version 1.0 was released on Dec. 15. Navigator was the first commercial Web browser to be wildly successful, rapidly achieving 90 percent market share before Microsoft entered the fray and took over the market. By 2000, Netscape's market share would fall under 1 percent, Janco Associates says.