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Microsoft posts final IE9 preview with high web accuracy

updated 06:45 pm EDT, Wed August 4, 2010

IE9 final preview live, near perfect in Acid3

Microsoft today posted the fourth and last Platform Preview of Internet Explorer 9 with its first truly high web accuracy score. The release finally moves the company's new Chakra engine for JavaScript into the browser itself and scores 95 on the historically difficult Acid3 accuracy test. While still short of the perfect scores of Apple's Safari and Google Chrome, the result is roughly on par with Firefox 4 and addresses a longstanding complaint of inaccuracy in IE.

A perfect score isn't deemed essential at this stage as the remaining standards are ones seen as in transition. Formats such as SVG (Scalable Vector Graphics) aren't considered a high priority as their use has been declining and in some cases discouraged.

At least one beta of IE9 is due and should follow the same pacing for a release as earlier previews, which puts the more publicly available version of the browser sometime in September. No clues have been given of the timetable for a final release, but CEO Steve Ballmer is due to host a pre-CES keynote on January 5 that could be a vehicle for the finished version.

IE9 is one of the first Microsoft browsers designed primarily with accuracy in mind and will bring the browser up to date with technologies that have existed elsewhere for months or years, such as partial HTML5 support. It will be the first Microsoft browser to use graphics hardware acceleration for rendering and could outpace Safari 5 on Windows.

By Electronista Staff


  1. MisterMe

    Fresh-Faced Recruit

    Joined: May 2007


    If everyone else does it, then ...

    ... we will consider it.

    It is inexcusable that any browser that scores less than 100% on the Acid3 Test should be released today. Safari does it. Chrome does it. Opera does it. OmniWeb does it. iCab does it. Firefox and the other Gecko-based browsers don't do it. That is the thin reed upon which Microsoft and its apologists base their excuse. Shame.

  1. PRoth

    Fresh-Faced Recruit

    Joined: Aug 2008


    Final release to come...

    I suppose the jury will be out on this one, but you have to admit that IE has made some progress, slow and painful though it has been...

  1. testudo

    Forum Regular

    Joined: Aug 2001


    Re: If everyone else does it

    It is inexcusable that any browser that scores less than 100% on the Acid3 Test should be released today.

    Why? Acid3 is some arbitrary test of various features of HTML. It isn't the end-all-be-all capabilities of a browser, nor is not passing it 100% an indictment, as you don't know what useless c*** that 5% covers.

    Acid3 is just some benchmark, and passing it just means you pass some benchmark. It doesn't test that you support all valid HTML, css, and scripting commands.

    Perhaps you recall the fun days of the graphic card wars, where several manufacturers were caught tweaking their drivers to improve performance in the benchmark tests, though they weren't as fast or efficient in 'the real world'.

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