diff -r 000000000000 -r 6474c204b198 browser/components/sessionstore/test/browser_588426.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/sessionstore/test/browser_588426.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  let state = { windows: [{ tabs: [
+      {entries: [{url: "about:mozilla"}], hidden: true},
+      {entries: [{url: "about:rights"}], hidden: true}
+  ] }] };
+
+  waitForExplicitFinish();
+
+  newWindowWithState(state, function (win) {
+    registerCleanupFunction(function () win.close());
+
+    is(win.gBrowser.tabs.length, 2, "two tabs were restored");
+    is(win.gBrowser.visibleTabs.length, 1, "one tab is visible");
+
+    let tab = win.gBrowser.visibleTabs[0];
+    is(tab.linkedBrowser.currentURI.spec, "about:mozilla", "visible tab is about:mozilla");
+
+    finish();
+  });
+}
+
+function newWindowWithState(state, callback) {
+  let opts = "chrome,all,dialog=no,height=800,width=800";
+  let win = window.openDialog(getBrowserURL(), "_blank", opts);
+
+  win.addEventListener("load", function onLoad() {
+    win.removeEventListener("load", onLoad, false);
+
+    executeSoon(function () {
+      win.addEventListener("SSWindowStateReady", function onReady() {
+        win.removeEventListener("SSWindowStateReady", onReady, false);
+        whenTabRestored(win.gBrowser.tabs[0], () => callback(win));
+      }, false);
+
+      ss.setWindowState(win, JSON.stringify(state), true);
+    });
+  }, false);
+}