       do (type) -> installListener window, type, (event) -> handlerStack.bubbleEvent type, event
     installListener document, "DOMActivate", (event) -> handlerStack.bubbleEvent 'DOMActivate', event
     installedListeners = true
+    # Other one-time initialization operations.
     FindModeHistory.init()
+    new GrabBackFocus if isEnabledForUrl
 
 #
 # Whenever we get the focus:

  settings.addEventListener("load", LinkHints.init.bind(LinkHints))
  settings.load()

  initializeModes()
  checkIfEnabledForUrl()
  refreshCompletionKeys()

  new NormalMode
  new PassKeysMode
  new InsertMode permanent: true
  Scroller.init settings

#
