diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_tabactor-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_tabactor-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,70 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Check extension-added tab actor lifetimes.
+ */
+
+const CHROME_URL = "chrome://mochitests/content/browser/browser/devtools/debugger/test/"
+const ACTORS_URL = CHROME_URL + "testactors.js";
+const TAB_URL = EXAMPLE_URL + "doc_empty-tab-01.html";
+
+let gClient;
+
+function test() {
+  if (!DebuggerServer.initialized) {
+    DebuggerServer.init(() => true);
+    DebuggerServer.addBrowserActors();
+  }
+
+  DebuggerServer.addActors(ACTORS_URL);
+
+  let transport = DebuggerServer.connectPipe();
+  gClient = new DebuggerClient(transport);
+  gClient.connect((aType, aTraits) => {
+    is(aType, "browser",
+      "Root actor should identify itself as a browser.");
+
+    addTab(TAB_URL)
+      .then(() => attachTabActorForUrl(gClient, TAB_URL))
+      .then(testTabActor)
+      .then(closeTab)
+      .then(closeConnection)
+      .then(finish)
+      .then(null, aError => {
+        ok(false, "Got an error: " + aError.message + "\n" + aError.stack);
+      });
+  });
+}
+
+function testTabActor([aGrip, aResponse]) {
+  let deferred = promise.defer();
+
+  ok(aGrip.testTabActor1,
+    "Found the test tab actor.");
+  ok(aGrip.testTabActor1.contains("test_one"),
+    "testTabActor1's actorPrefix should be used.");
+
+  gClient.request({ to: aGrip.testTabActor1, type: "ping" }, aResponse => {
+    is(aResponse.pong, "pong",
+      "Actor should respond to requests.");
+
+    deferred.resolve();
+  });
+
+  return deferred.promise;
+}
+
+function closeTab() {
+  return removeTab(gBrowser.selectedTab);
+}
+
+function closeConnection() {
+  let deferred = promise.defer();
+  gClient.close(deferred.resolve);
+  return deferred.promise;
+}
+
+registerCleanupFunction(function() {
+  gClient = null;
+});