THE US Department of Justice may be bulldozing Microsoft, but the software giant has taken another step ahead in its effort to rule the Web. Its browser, Internet Explorer, seems to have gone ahead as the preferred browser over Netscape's Navigator. November data released by AdKnowledge shows Explorer having touched 50 per cent in the browser market, while Navigator has fallen to 45 per cent. In January 1997, Explorer had a 20 per cent marketshare, while Navigator ruled the Internet with 77 per cent share. But that was before Microsoft started giving out Explorer free.