diff --git a/mozilla/browser/base/content/browser.js b/mozilla/browser/base/content/browser.js
index 741093c86ef..81e91463e69 100644
--- a/mozilla/browser/base/content/browser.js
+++ b/mozilla/browser/base/content/browser.js
@@ -6150,6 +6150,15 @@ missingPluginInstaller.prototype.newMissingPlugin = function(aEvent){
   }
 }
 
+missingPluginInstaller.prototype.closeNotification = function() {
+  var notificationBox = gBrowser.getNotificationBox();
+  var notification = notificationBox.getNotificationWithValue("missing-plugins");
+
+  if (notification) {
+    notificationBox.removeNotification(notification);
+  }
+}
+
 function pluginsMissing()
 {
   // get the urls of missing plugins
diff --git a/mozilla/toolkit/mozapps/plugins/content/pluginInstallerWizard.js b/mozilla/toolkit/mozapps/plugins/content/pluginInstallerWizard.js
index f321ed3ef10..c84d84b4c97 100644
--- a/mozilla/toolkit/mozapps/plugins/content/pluginInstallerWizard.js
+++ b/mozilla/toolkit/mozapps/plugins/content/pluginInstallerWizard.js
@@ -646,7 +646,7 @@ function wizardFinish(){
     // clear the tab's plugin list only if we installed at least one plugin
     gPluginInstaller.mTab.missingPlugins = null;
     // reset UI
-    window.opener.getBrowser().hideMessage(null, "top");
+    window.opener.gMissingPluginInstaller.closeNotification();
     // reload the browser to make the new plugin show
     window.opener.getBrowser().reloadTab(gPluginInstaller.mTab);
   }