Final Peek at IE9 Preview Before September Beta

Microsoft has released another in a series of platform improvements featuring native JavaScript integration, hardware-accelerated HTML5 and much improved Acid3 scores, among other enhancements. The release is the last of 4, leading up to the September Beta release of IE9.

Going by the progress Microsoft has made in its previous Platform Previews, you might expect to see enhancements to the company's "same markup" strategy, improved browser performance, greater compatibility and compliance with standards, enhanced HTML5 support, more test cases, and improved Acid3 test scores. With IE9 Platform Preview 4 you get all that and more. Yet perhaps the standout feature of the several new and improved ones is the integration of the IE9 JavaScript engine into the browser itself rather than being simply bolted on.

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