Internet Explorer 6.02001 August 27th
Less than two months before the official release of the Windows XP operating system, Microsoft released Internet Explorer 6.0. IE 6 was integrated into Windows XP and was also compatible with previous versions of the system down to Windows 98. Despite a significant amount of security flaws and lack of support for web standards, Internet Explorer 6.0 gained more than 80% market share in 2004. Together with earlier versions of IE 5.0 and IE 5.5, the proportion of Internet Explorer browsers in 2004 was more than 90%.