diff --git a/modules/plugin/base/public/nsIPluginInstancePeer2.h b/modules/plugin/base/public/nsIPluginInstancePeer2.h
new file mode 100644
index 000000000000..3f8ae35126b1
--- /dev/null
+++ b/modules/plugin/base/public/nsIPluginInstancePeer2.h
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#ifndef nsIPluginInstancePeer2_h___
+#define nsIPluginInstancePeer2_h___
+
+#include "nsIPluginInstancePeer.h"
+
+struct JSObject;
+
+// {e7d48c00-e1f1-11d2-8360-fbc8abc4ae7c}
+#define NS_IPLUGININSTANCEPEER2_IID \
+{ 0xe7d48c00, 0xe1f1, 0x11d2, { 0x83, 0x60, 0xfb, 0xc8, 0xab, 0xc4, 0xae, 0x7c } }
+
+/**
+ * The nsIPluginInstancePeer2 interface extends the nsIPluginInstancePeer
+ * interface, providing access to functionality provided by newer browsers.
+ * All functionality in nsIPluginInstancePeer can be mapped to the 4.X
+ * plugin API.
+ */
+class nsIPluginInstancePeer2 : public nsIPluginInstancePeer {
+public:
+	NS_DEFINE_STATIC_IID_ACCESSOR(NS_IPLUGININSTANCEPEER2_IID)
+	
+    /**
+     * Get the JavaScript window object corresponding to this plugin instance.
+     *
+     * @param outJSWindow - the resulting JavaScript window object
+     * @result - NS_OK if this operation was successful
+     */
+	NS_IMETHOD
+	GetJSWindow(JSObject* *outJSWindow) = 0;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+#endif /* nsIPluginInstancePeer2_h___ */
diff --git a/modules/plugin/public/nsIPluginInstancePeer2.h b/modules/plugin/public/nsIPluginInstancePeer2.h
new file mode 100644
index 000000000000..3f8ae35126b1
--- /dev/null
+++ b/modules/plugin/public/nsIPluginInstancePeer2.h
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#ifndef nsIPluginInstancePeer2_h___
+#define nsIPluginInstancePeer2_h___
+
+#include "nsIPluginInstancePeer.h"
+
+struct JSObject;
+
+// {e7d48c00-e1f1-11d2-8360-fbc8abc4ae7c}
+#define NS_IPLUGININSTANCEPEER2_IID \
+{ 0xe7d48c00, 0xe1f1, 0x11d2, { 0x83, 0x60, 0xfb, 0xc8, 0xab, 0xc4, 0xae, 0x7c } }
+
+/**
+ * The nsIPluginInstancePeer2 interface extends the nsIPluginInstancePeer
+ * interface, providing access to functionality provided by newer browsers.
+ * All functionality in nsIPluginInstancePeer can be mapped to the 4.X
+ * plugin API.
+ */
+class nsIPluginInstancePeer2 : public nsIPluginInstancePeer {
+public:
+	NS_DEFINE_STATIC_IID_ACCESSOR(NS_IPLUGININSTANCEPEER2_IID)
+	
+    /**
+     * Get the JavaScript window object corresponding to this plugin instance.
+     *
+     * @param outJSWindow - the resulting JavaScript window object
+     * @result - NS_OK if this operation was successful
+     */
+	NS_IMETHOD
+	GetJSWindow(JSObject* *outJSWindow) = 0;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+#endif /* nsIPluginInstancePeer2_h___ */