--- a/browser/base/content/browser-social.js
+++ b/browser/base/content/browser-social.js
@@ -113,16 +113,17 @@ let SocialUI = {
     // The View->Sidebar and Menubar->Tools menu.
     for (let id of ["menu_socialSidebar", "menu_socialAmbientMenu"])
       document.getElementById(id).setAttribute("label", Social.provider.name);
 
     SocialToolbar.init();
     SocialShareButton.init();
     SocialSidebar.init();
     SocialMenu.populate();
+    SocialChatBar.update();
     this.updateActiveBroadcaster();
   },
 
   updateToggleCommand: function SocialUI_updateToggleCommand() {
     if (!Social.provider)
       return;
 
     let toggleCommand = this.toggleCommand;

--- a/browser/base/content/test/browser_social_chatwindow.js
+++ b/browser/base/content/test/browser_social_chatwindow.js
@@ -407,16 +407,38 @@ var tests = {
             port.close();
             next();
           });
       }
     }
     port.postMessage({topic: "test-init", data: { id: 1 }});
   },
 
+  testSecondTopLevelWindow: function(next) {
+    // Bug 817782 - check chats work in new top-level windows.
+    const chatUrl = "https://example.com/browser/browser/base/content/test/social_chat.html";
+    let port = Social.provider.getWorkerPort();
+    let secondWindow;
+    port.onmessage = function(e) {
+      if (e.data.topic == "test-init-done") {
+        secondWindow = OpenBrowserWindow();
+        secondWindow.addEventListener("load", function loadListener() {
+          secondWindow.removeEventListener("load", loadListener);
+          port.postMessage({topic: "test-worker-chat", data: chatUrl});
+        });
+      } else if (e.data.topic == "got-chatbox-message") {
+        // the chat was created - let's make sure it was created in the second window.
+        is(secondWindow.SocialChatBar.chatbar.childElementCount, 1);
+        secondWindow.close();
+        next();
+      }
+    }
+    port.postMessage({topic: "test-init"});
+  },
+
   // XXX - note this must be the last test until we restore the login state
   // between tests...
   testCloseOnLogout: function(next) {
     const chatUrl = "https://example.com/browser/browser/base/content/test/social_chat.html";
     let port = Social.provider.getWorkerPort();
     ok(port, "provider has a port");
     port.postMessage({topic: "test-init"});
     port.onmessage = function (e) {