The Execution Extension includes an OnAfterTestCompleted method. This method has an ExecutionContext parameter. If you try to get at the DOM using the code:

executionContext.Manager.ActiveBrowser.ViewSourceString;

All you get is a very empty DOM, not the last page displayed in the browser at the time the test finished. It would be convenient to leave the DOM alone such that a user can capture a snapshot or look at some component of the DOM at the time the test actually finished.