diff -r 000000000000 -r 6474c204b198 browser/base/content/test/social/browser_social_multiworker.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/social/browser_social_multiworker.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,69 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function test() {
+  waitForExplicitFinish();
+
+  runSocialTestWithProvider(gProviders, function (finishcb) {
+    runSocialTests(tests, undefined, undefined, function() {
+      finishcb();
+    });
+  });
+}
+
+let gProviders = [
+  {
+    name: "provider 1",
+    origin: "https://example.com",
+    sidebarURL: "https://example.com/browser/browser/base/content/test/social/social_sidebar.html?provider1",
+    workerURL: "https://example.com/browser/browser/base/content/test/social/social_worker.js",
+    iconURL: "chrome://branding/content/icon48.png"
+  },
+  {
+    name: "provider 2",
+    origin: "https://test1.example.com",
+    sidebarURL: "https://test1.example.com/browser/browser/base/content/test/social/social_sidebar.html?provider2",
+    workerURL: "https://test1.example.com/browser/browser/base/content/test/social/social_worker.js",
+    iconURL: "chrome://branding/content/icon48.png"
+  }
+];
+
+var tests = {
+  testWorkersAlive: function(next) {
+    // verify we can get a message from all providers that are enabled
+    let messageReceived = 0;
+    function oneWorkerTest(provider) {
+      let port = provider.getWorkerPort();
+      port.onmessage = function (e) {
+        let topic = e.data.topic;
+        switch (topic) {
+          case "test-init-done":
+            ok(true, "got message from provider " + provider.name);
+            port.close();
+            messageReceived++;
+            break;
+        }
+      };
+      port.postMessage({topic: "test-init"});
+    }
+
+    for (let p of Social.providers) {
+      oneWorkerTest(p);
+    }
+
+    waitForCondition(function() messageReceived == Social.providers.length,
+                     next, "received messages from all workers");
+  },
+
+   testMultipleWorkerEnabling: function(next) {
+     // test that all workers are enabled when we allow multiple workers
+     for (let p of Social.providers) {
+       ok(p.enabled, "provider enabled");
+       let port = p.getWorkerPort();
+       ok(port, "worker enabled");
+       port.close();
+     }
+     next();
+   }
+}