After giving WebStorm 9 a try for a few weeks for client side JS development, WebStorm 9 completely stop responding to user interaction or extremely slow after startup. This force us to go back to the good old boring tool VS :-(.
It seems how to set up JavaScript intellisense such as jQuery 2.0 intellisense for VS 2013 is not well documented at MSDN. The new way to set it up has been blogged at The story behind _references.js.
Here are some missing details and considerations about the setup when use it together with NPM + Browserify.