[scriptable, uuid(7f750b1a-35b7-11de-b025-b7deb5eac8bf)]
interface nsISessionStore_MOZILLA_1_9_1 : nsISessionStore


 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)