diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_on-pause-highlight.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_on-pause-highlight.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,77 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that debugger's tab is highlighted when it is paused and not the
+ * currently selected tool.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_recursion-stack.html";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+let gToolbox, gToolboxTab;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gToolbox = gPanel._toolbox;
+    gToolboxTab = gToolbox.doc.getElementById("toolbox-tab-jsdebugger");
+
+    waitForSourceShown(gPanel, ".html").then(testPause);
+  });
+}
+
+function testPause() {
+  is(gDebugger.gThreadClient.paused, false,
+    "Should be running after starting test.");
+
+  gDebugger.gThreadClient.addOneTimeListener("paused", () => {
+    gToolbox.selectTool("webconsole").then(() => {
+      ok(gToolboxTab.hasAttribute("highlighted") &&
+         gToolboxTab.getAttribute("highlighted") == "true",
+        "The highlighted class is present");
+      ok(!gToolboxTab.hasAttribute("selected") ||
+          gToolboxTab.getAttribute("selected") != "true",
+        "The tab is not selected");
+    }).then(() => gToolbox.selectTool("jsdebugger")).then(() => {
+      ok(gToolboxTab.hasAttribute("highlighted") &&
+         gToolboxTab.getAttribute("highlighted") == "true",
+        "The highlighted class is present");
+      ok(gToolboxTab.hasAttribute("selected") &&
+         gToolboxTab.getAttribute("selected") == "true",
+        "...and the tab is selected, so the glow will not be present.");
+    }).then(testResume);
+  });
+
+  EventUtils.sendMouseEvent({ type: "mousedown" },
+    gDebugger.document.getElementById("resume"),
+    gDebugger);
+}
+
+function testResume() {
+  gDebugger.gThreadClient.addOneTimeListener("resumed", () => {
+    gToolbox.selectTool("webconsole").then(() => {
+      ok(!gToolboxTab.classList.contains("highlighted"),
+        "The highlighted class is not present now after the resume");
+      ok(!gToolboxTab.hasAttribute("selected") ||
+          gToolboxTab.getAttribute("selected") != "true",
+        "The tab is not selected");
+    }).then(() => closeDebuggerAndFinish(gPanel));
+  });
+
+  EventUtils.sendMouseEvent({ type: "mousedown" },
+    gDebugger.document.getElementById("resume"),
+    gDebugger);
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gToolbox = null;
+  gToolboxTab = null;
+});