is there any list which HTML5 features the WebView supports and which not? I am interested mainly in:
1) localStorage/sessionStorage
2) offline manifest
The right answer ought to be caniuse.com which is currently the best site for non-mobile browser info. From what I've found there is no other site which has this sort of information. I would encourage you to encourage the maintainer of caniuse.com to add mobile browser information. You can do that by posting here:
http://a.deveria.com/?p=82#comments
For complete HTML5, CSS3 features supported by Android browser, see
Mobile browser info is actually now included on caniuse.com, for your list see:
http://caniuse.com/#agents=mobile&feat=namevalue-storage,offline-apps,websockets,webworkers
Or for everything: http://caniuse.com/#agents=mobile