diff -r 000000000000 -r 6474c204b198 browser/components/sessionstore/test/browser_491168.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/sessionstore/test/browser_491168.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+/* 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/. */
+
+function test() {
+  /** Test for Bug 491168 **/
+
+  waitForExplicitFinish();
+
+  const REFERRER1 = "http://example.org/?" + Date.now();
+  const REFERRER2 = "http://example.org/?" + Math.random();
+
+  let tab = gBrowser.addTab();
+  gBrowser.selectedTab = tab;
+
+  let browser = tab.linkedBrowser;
+  whenBrowserLoaded(browser, function() {
+    let tabState = JSON.parse(ss.getTabState(tab));
+    is(tabState.entries[0].referrer,  REFERRER1,
+       "Referrer retrieved via getTabState matches referrer set via loadURI.");
+
+    tabState.entries[0].referrer = REFERRER2;
+    ss.setTabState(tab, JSON.stringify(tabState));
+
+    whenTabRestored(tab, function(e) {
+      is(window.content.document.referrer, REFERRER2, "document.referrer matches referrer set via setTabState.");
+
+      gBrowser.removeTab(tab);
+
+      let newTab = ss.undoCloseTab(window, 0);
+      whenTabRestored(newTab, function() {
+        is(window.content.document.referrer, REFERRER2, "document.referrer is still correct after closing and reopening the tab.");
+        gBrowser.removeTab(newTab);
+
+        finish();
+      });
+    });
+  });
+
+  let referrerURI = Services.io.newURI(REFERRER1, null, null);
+  browser.loadURI("http://example.org", referrerURI, null);
+}