diff -r 000000000000 -r 6474c204b198 browser/devtools/tilt/test/browser_tilt_03_tab_switch.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/tilt/test/browser_tilt_03_tab_switch.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,106 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+let tab0, tab1, tab2;
+let testStep = -1;
+
+function test() {
+  if (!isTiltEnabled()) {
+    info("Skipping tab switch test because Tilt isn't enabled.");
+    return;
+  }
+  if (!isWebGLSupported()) {
+    info("Skipping tab switch test because WebGL isn't supported.");
+    return;
+  }
+
+  waitForExplicitFinish();
+
+  gBrowser.tabContainer.addEventListener("TabSelect", tabSelect, false);
+  createTab1();
+}
+
+function createTab1() {
+  tab0 = gBrowser.selectedTab;
+
+  tab1 = createTab(function() {
+    createTilt({
+      onTiltOpen: function()
+      {
+        createTab2();
+      }
+    }, false, function suddenDeath()
+    {
+      info("Tilt could not be initialized properly.");
+      cleanup();
+    });
+  });
+}
+
+function createTab2() {
+  tab2 = createTab(function() {
+
+    createTilt({
+      onTiltOpen: function()
+      {
+        testStep = 0;
+        tabSelect();
+      }
+    }, false, function suddenDeath()
+    {
+      info("Tilt could not be initialized properly.");
+      cleanup();
+    });
+  });
+}
+
+let testSteps = [
+  function step0() {
+    gBrowser.selectedTab = tab1;
+  },
+  function step1() {
+    gBrowser.selectedTab = tab0;
+  },
+  function step2() {
+    gBrowser.selectedTab = tab1;
+  },
+  function step3() {
+    gBrowser.selectedTab = tab2;
+  },
+  function step4() {
+    Tilt.destroy(Tilt.currentWindowId);
+    gBrowser.removeCurrentTab();
+    tab2 = null;
+  },
+  function step5() {
+    Tilt.destroy(Tilt.currentWindowId);
+    gBrowser.removeCurrentTab();
+    tab1 = null;
+  },
+  function step6_cleanup() {
+    cleanup();
+  }
+];
+
+function cleanup() {
+  gBrowser.tabContainer.removeEventListener("TabSelect", tabSelect, false);
+
+  if (tab1) {
+    gBrowser.removeTab(tab1);
+    tab1 = null;
+  }
+  if (tab2) {
+    gBrowser.removeTab(tab2);
+    tab2 = null;
+  }
+
+  finish();
+}
+
+function tabSelect() {
+  if (testStep !== -1) {
+    executeSoon(testSteps[testStep]);
+    testStep++;
+  }
+}