There are several reasons that many giant websites are ending support for IE6:
- IE6 is less secure. Multiple security vulnerabilities in IE6 have been exploited over the years. The most recent attacks against Google, Yahoo, and other companies specifically targeted vulnerabilities easily accessible in IE6 but much more difficult to exploit in IE7 and IE8—leading the Microsoft Security Response Center to recommend that users of IE6 upgrade to a newer version of Internet Explorer.
- IE6 is slow. Of all of the supported browsers, IE6 provides the slowest and least rewarding user experience for customers.
- IE6 is a “last generation” browser. IE6 was first released in August 2001. As an obsolete, non-standard platform, IE6 is a difficult browser on which to develop and support the rich internet applications customers have come to expect.