Some interesting questions have been raised regarding sandboxing in AIR, and whether the AIR Application sandbox is “weaker” than the equivalent browser sandbox.
On the face of this, this seems like a reasonable assumption to make. Simply adding system access to a browser sandbox would indeed be much scarier, but that is not what happened. In fact, AIR Application sandbox is significantly different from a browser sandbox insofar that many high-risk APIs have been disabled or severely restricted, making it far more difficult to attack such applications. So the AIR sandbox is not weaker than a browser sandbox; it is different, and in many respects stronger.