diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_bug462289.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_bug462289.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,78 @@
+var tab1, tab2;
+
+function focus_in_navbar()
+{
+  var parent = document.activeElement.parentNode;
+  while (parent && parent.id != "nav-bar")
+    parent = parent.parentNode;
+
+  return parent != null;
+}
+
+function test()
+{
+  waitForExplicitFinish();
+
+  tab1 = gBrowser.addTab("about:blank", {skipAnimation: true});
+  tab2 = gBrowser.addTab("about:blank", {skipAnimation: true});
+
+  EventUtils.synthesizeMouseAtCenter(tab1, {});
+  setTimeout(step2, 0);
+}
+
+function step2()
+{
+  is(gBrowser.selectedTab, tab1, "1st click on tab1 selects tab");
+  isnot(document.activeElement, tab1, "1st click on tab1 does not activate tab");
+
+  EventUtils.synthesizeMouseAtCenter(tab1, {});
+  setTimeout(step3, 0);
+}
+
+function step3()
+{
+  is(gBrowser.selectedTab, tab1, "2nd click on selected tab1 keeps tab selected");
+  isnot(document.activeElement, tab1, "2nd click on selected tab1 does not activate tab");
+
+  ok(true, "focusing URLBar then sending 1 Shift+Tab.");
+  gURLBar.focus();
+  EventUtils.synthesizeKey("VK_TAB", {shiftKey: true});
+  is(gBrowser.selectedTab, tab1, "tab key to selected tab1 keeps tab selected");
+  is(document.activeElement, tab1, "tab key to selected tab1 activates tab");
+
+  EventUtils.synthesizeMouseAtCenter(tab1, {});
+  setTimeout(step4, 0);
+}
+
+function step4()
+{
+  is(gBrowser.selectedTab, tab1, "3rd click on activated tab1 keeps tab selected");
+  is(document.activeElement, tab1, "3rd click on activated tab1 keeps tab activated");
+
+  EventUtils.synthesizeMouseAtCenter(tab2, {});
+  setTimeout(step5, 0);
+}
+
+function step5()
+{
+  // The tabbox selects a tab within a setTimeout in a bubbling mousedown event
+  // listener, and focuses the current tab if another tab previously had focus.
+  is(gBrowser.selectedTab, tab2, "click on tab2 while tab1 is activated selects tab");
+  is(document.activeElement, tab2, "click on tab2 while tab1 is activated activates tab");
+
+  ok(true, "focusing content then sending middle-button mousedown to tab2.");
+  gBrowser.selectedBrowser.focus();
+  EventUtils.synthesizeMouseAtCenter(tab2, {button: 1, type: "mousedown"});
+  setTimeout(step6, 0);
+}
+
+function step6()
+{
+  is(gBrowser.selectedTab, tab2, "middle-button mousedown on selected tab2 keeps tab selected");
+  isnot(document.activeElement, tab2, "middle-button mousedown on selected tab2 does not activate tab");
+
+  gBrowser.removeTab(tab2);
+  gBrowser.removeTab(tab1);
+
+  finish();
+}