I think HTML5 it will be good in the next few months not now, Divorced Google This website HTML5ROCKS for the definition of HTML5 for Developers, you can see the Presentation to know more information about it.
Hello Guys ,
You just need to install the 64 bit version from the PPA (This is a personal package archive for experimental software, packages may often break or contain severe bugs. It should not be used except for development purposes.) by executing the following:
sudo add-apt-repository ppa:sevenmachines/flash && sudo apt-get update &&
sudo apt-get install flashplugin64-installer