nsISessionStore_MOZILLA_1_9_1 Interface

 Get the number of restore-able windows

unsigned long getClosedWindowCount()

 Get closed windows data

 @returns a JSON string representing the list of closed windows.

AString getClosedWindowData()

 @param aIndex is the index of the windows to be restored (FIFO ordered).
 @returns the nsIDOMWindow object of the reopened window

nsIDOMWindow undoCloseWindow(in unsigned long aIndex)