Microsoft releases final IE9 preview, beta due in September

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Microsoft releases final IE9 preview, beta due in September

By Ed Bott | August 4, 2010, 12:05pm PDT

Internet Explorer 9 continues its steady pace toward a final release. Today’s milestone is an important one. The fourth and final Platform Preview, like its predecessors, is intended for developers to test their web sites and report bugs. Most of the major pieces of IE9’s HTML5 support were put in place in the previous release. This preview incorporates a slew of bug fixes (more than 1300 bug reports have been filed at Microsoft’s Connect site) and shows off what Microsoft claims are big improvements in its new Chakra JavaScript engine. IE boss Dean Hachamovich argues that how a JavaScript engine is integrated into the browser is as important as the engine itself, in terms of performance:

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