There has been an almost complete new set of browsers released in the last two months from all the major browser vendors. So these new browsers are included in these tests using the revised HTML5Test.com 450 item benchmark. The browsers are ranked by their % compliance scores with Google Chrome the best and IE 9 and 10 the worst.



Browser HTML5 Compliance Rankings Browser HTML5 Test Results Chrome 14.0885 341/450=75.8% +13 bonus points Firefox 7.01 313/450=69.6% + 9 bonus points Safari 5.1 293/450=65.1% + 9 bonus points Opera 11.50 286/450=63.6% + 7 bonus points IE10 2nd preview 231/450= 51.3% + 6 bonus points IE9.0.8182 141/450=31.3% + 5 bonus points

The real problem here is that there are some contentious HTML5 standards such as touch and gestures, Web Offline, Metadata, Web Database have to be agreed to. And the various vendors are starting to set out seriously different positions. Given that HTML5 and Adobe AIR are the last two cross platform development tools that can claim any degree of portability among desktop+mobile OS[yes AIR runs on iOS], HTML5 compliance now becomes a critical issue not just for developers and users but IT shops and CIOs.