diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug706430.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug706430.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,65 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let state1 = {
+  windows: [{
+    tabs: [{
+      entries: [{ url: "about:blank#1" }],
+      hidden: true,
+      extData: {"tabview-tab": '{"url":"about:blank#1","groupID":1,"bounds":{"left":120,"top":20,"width":20,"height":20}}'}
+    },{
+      entries: [{ url: "about:blank#2" }],
+      hidden: false,
+      extData: {"tabview-tab": '{"url":"about:blank#2","groupID":2,"bounds":{"left":20,"top":20,"width":20,"height":20}}'},
+    }],
+    selected: 2,
+    extData: {
+      "tabview-groups": '{"nextID":3,"activeGroupId":2, "totalNumber":2}',
+      "tabview-group":
+        '{"1":{"bounds":{"left":15,"top":5,"width":280,"height":232},"id":1},' +
+        '"2":{"bounds":{"left":309,"top":5,"width":267,"height":226},"id":2}}'
+    }
+  }]
+};
+
+let state2 = {
+  windows: [{
+    tabs: [{entries: [{ url: "about:blank#1" }], hidden: true},
+           {entries: [{ url: "about:blank#2" }], hidden: false}],
+    selected: 2
+  }]
+};
+
+let ss = Cc["@mozilla.org/browser/sessionstore;1"]
+         .getService(Ci.nsISessionStore);
+
+function test() {
+  waitForExplicitFinish();
+
+  newWindowWithState(state1, function (win) {
+    registerCleanupFunction(function () win.close());
+
+    showTabView(function () {
+      let cw = win.TabView.getContentWindow();
+      let [group1, group2] = cw.GroupItems.groupItems;
+      let [tab1, tab2] = win.gBrowser.tabs;
+
+      checkUrl(group1.getChild(0), "about:blank#1", "tab1 is in first group");
+      checkUrl(group2.getChild(0), "about:blank#2", "tab2 is in second group");
+
+      whenWindowStateReady(win, function () {
+        let groups = cw.GroupItems.groupItems;
+        is(groups.length, 1, "one groupItem");
+        is(groups[0].getChildren().length, 2, "single groupItem has two children");
+
+        finish();
+      });
+
+      ss.setWindowState(win, JSON.stringify(state2), true);
+    }, win);
+  });
+}
+
+function checkUrl(aTabItem, aUrl, aMsg) {
+  is(aTabItem.tab.linkedBrowser.currentURI.spec, aUrl, aMsg);
+}