--- a/browser/base/content/web-panels.js
+++ b/browser/base/content/web-panels.js
@@ -69,16 +69,17 @@ function loadWebPanel(aURI) {
     panelBrowser.setAttribute("cachedurl", aURI);
 }
 
 function load()
 {
     var panelBrowser = getPanelBrowser();
     panelBrowser.webProgress.addProgressListener(panelProgressListener,
                                                  Ci.nsIWebProgress.NOTIFY_ALL);
+    panelBrowser.messageManager.loadFrameScript("chrome://browser/content/content.js", true);
     var cachedurl = panelBrowser.getAttribute("cachedurl")
     if (cachedurl) {
         panelBrowser.webNavigation
                     .loadURI(cachedurl, nsIWebNavigation.LOAD_FLAGS_NONE, null,
                              null, null);
     }
 
     gLoadFired = true;