The version of Firefox in the 10.10 repos seems to perform pretty poorly on the HTML5 test. Why is this? Is there something I can do about that? Does it matter?
Because Firefox 3.6 doesn’t support all the html5 specifications, no browser today does. Look at http://html5readiness.com/ which browser supports what features. No it doesn’t matter a whole lot, html5 is still in the development stages.