Safari is not one of those most frequently used is a fact. Internet Explorer still dominates the world (although Firefox has passed recently in Europe) and Apple could not allow this. In an attempt to put its Safari browser as one of the most used worldwide, the company Apple might be planning an integration of this with iTunes. In this way, you reproduce your music directly from the browser via a built-in playback buttons.
This integration could be announced from September according to a source says the web 9to5Mac and would be a pretty smart move by Apple to climb the ladder in the war of browser usage.