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I thought the Acid3 test score of 95 for IE 9 might be a good index for seeing how well it supports HTML5 and CSS3, but then later found out that Acid3's Wiki has little mentioning of HTML5 and CSS3: http://en.wikipedia.org/wiki/Acid3

Is Acid3 score a good indicator for HTML5 and CSS3 support? If not, is there a score that gives a good index for them?

nonopolarity
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2 Answers2

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Acid3 doesn't tell you anything. Use http://caniuse.com/ to see which technologies are available in browsers.

ZippyV
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The HTML5 test - How well does your browser support HTML5

or

Modernizr is an open source, MIT-licensed JavaScript library that detects support for many HTML5 & CSS3 features.

Michał Kuliński
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