Nokia brags with best-in-industry HTML5 performance on the N9 browser, downplays Flash support
The MeeGo-powered Nokia N9 comes with an all-new HTML5-enabled browser – a crucial piece of software for the Finns, who failed to deliver a contemporary browser in Symbian^3, at least before the Anna update. Maybe that's the reason why Nokia picked “the browser that doesn’t annoy me” motto for the browser in the N9 and to a certain extent it seems that the company has succeeded with meeting this goal.
But it's HTML5 where the N9 browser truly shines. With a score of 283 at one HTML5 test, it outranks all other mobile browsers and takes on some desktop ones. Luckily, it supports HTML5 videos and CSS 3D, but also other mobile elements of the specifications for HTML5 like motion and location awareness. CSS 3, Javascript 1.8, XHTML and XML are all supported as well.
source: Nokia Conversations
Things that are NOT allowed: