diff -r 000000000000 -r 6474c204b198 browser/components/sessionstore/test/browser_701377.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/sessionstore/test/browser_701377.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/ */
+
+let state = {windows:[{tabs:[
+  {entries:[{url:"http://example.com#1"}]},
+  {entries:[{url:"http://example.com#2"}], hidden: true}
+]}]};
+
+function test() {
+  waitForExplicitFinish();
+
+  newWindowWithState(state, function (aWindow) {
+    let tab = aWindow.gBrowser.tabs[1];
+    ok(tab.hidden, "the second tab is hidden");
+
+    let tabShown = false;
+    let tabShowCallback = function () tabShown = true;
+    tab.addEventListener("TabShow", tabShowCallback, false);
+
+    let tabState = ss.getTabState(tab);
+    ss.setTabState(tab, tabState);
+
+    tab.removeEventListener("TabShow", tabShowCallback, false);
+    ok(tab.hidden && !tabShown, "tab remains hidden");
+
+    finish();
+  });
+}
+
+// ----------
+function newWindowWithState(aState, aCallback) {
+  let opts = "chrome,all,dialog=no,height=800,width=800";
+  let win = window.openDialog(getBrowserURL(), "_blank", opts);
+
+  registerCleanupFunction(function () win.close());
+
+  whenWindowLoaded(win, function onWindowLoaded(aWin) {
+    ss.setWindowState(aWin, JSON.stringify(aState), true);
+    executeSoon(function () aCallback(aWin));
+  });
+}