On March 16, Microsoft is making a first developer preview of Internet Explorer (IE) 9 available for download from www.IETestDrive.com.
The IE 9 Platform Preview doesn’t include the IE 9 user interface; instead, it is the plumbing, specifically the new Microsoft JavaScript engine (which is codenamed “Chakraâ€) and the new graphics subsystem, coupled with a home page full of test sites. There’s no back button and no built-in security. It’s basically the IE 9 rendering engine and early developer tools.