diff -r 000000000000 -r 6474c204b198 browser/components/sessionstore/test/browser_windowRestore_perwindowpb.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/sessionstore/test/browser_windowRestore_perwindowpb.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This test checks that closed private windows can't be restored
+
+function test() {
+  waitForExplicitFinish();
+
+  // Purging the list of closed windows
+  while(ss.getClosedWindowCount() > 0)
+    ss.forgetClosedWindow(0);
+
+  // Load a private window, then close it 
+  // and verify it doesn't get remembered for restoring
+  whenNewWindowLoaded({private: true}, function (win) {
+    info("The private window got loaded");
+    win.addEventListener("SSWindowClosing", function onclosing() {
+      win.removeEventListener("SSWindowClosing", onclosing, false);
+      executeSoon(function () {
+        is (ss.getClosedWindowCount(), 0,
+            "The private window should not have been stored");
+        finish();
+      });
+    }, false);
+    win.close();
+  });
+}