What features of HTML5 will only work with Chrome?

Every now and then our boss issues a Developer Challenge competition. He 开发者_StackOverflowchallenges us to do something with a new technology and whoever does the best wins a small prize. It's Just a bit of fun.

This time the challenge is to do something with HTML5. One of the requirements is that is has to work only in Chrome. I don't think this is a realistic requirement though, because I thought Firefox 6 & Chrome were pretty much on par with each other?

Are there any features of HTML5 that will work only in Chrome?

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You can use the FileWriter API. While there is a bunch of browsers implementing the File API, I think that only Chrome allows writing files (see http://caniuse.com/#search=filewriter).

caniuse.com lists other HTML5-features as well that are supposedly exclusive to Chrome right now, e.g. web notifications and <details> tag.

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Check this link http://html5test.com/results.html with Chrome.

Update: I find this usefull link with compatibility tables for support of HTML5, CSS3, SVG and more: When can I use...

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NaCl: Google's take on ActiveX. Have fun.