diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug586553.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug586553.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,61 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+
+  window.addEventListener("tabviewshown", onTabViewWindowLoaded, false);
+  TabView.toggle();
+}
+
+let moves = 0;
+let contentWindow = null;
+let newTabs = [];
+let originalTab = null;
+
+function onTabMove(e) {
+  let tab = e.target;
+  moves++;
+}
+
+function onTabViewWindowLoaded() {
+  window.removeEventListener("tabviewshown", onTabViewWindowLoaded, false);
+  
+  contentWindow = document.getElementById("tab-view").contentWindow;
+  
+  originalTab = gBrowser.selectedTab;
+  newTabs = [gBrowser.addTab("about:rights"), gBrowser.addTab("about:mozilla"), gBrowser.addTab("about:license")];
+
+  is(originalTab._tPos, 0, "Original tab is in position 0");
+  is(newTabs[0]._tPos, 1, "Rights is in position 1");
+  is(newTabs[1]._tPos, 2, "Mozilla is in position 2");
+  is(newTabs[2]._tPos, 3, "License is in position 3");
+  
+  gBrowser.tabContainer.addEventListener("TabMove", onTabMove, false);
+    
+  let groupItem = contentWindow.GroupItems.getActiveGroupItem();
+  
+  // move 3 > 0 (and therefore 0 > 1, 1 > 2, 2 > 3)
+  groupItem._children.splice(0, 0, groupItem._children.splice(3, 1)[0]);
+  groupItem.arrange();
+  
+  window.addEventListener("tabviewhidden", onTabViewWindowHidden, false);
+  TabView.toggle();
+}
+
+function onTabViewWindowHidden() {
+  window.removeEventListener("tabviewhidden", onTabViewWindowHidden, false);
+  gBrowser.tabContainer.removeEventListener("TabMove", onTabMove, false);
+  
+  is(moves, 1, "Only one move should be necessary for this basic move.");
+
+  is(newTabs[2]._tPos, 0, "License is in position 0");
+  is(originalTab._tPos, 1, "Original tab is in position 1");
+  is(newTabs[0]._tPos, 2, "Rights is in position 2");
+  is(newTabs[1]._tPos, 3, "Mozilla is in position 3");
+  
+  gBrowser.removeTab(newTabs[0]);
+  gBrowser.removeTab(newTabs[1]);
+  gBrowser.removeTab(newTabs[2]);
+  finish();
+}