diff --git a/mozilla/content/base/public/MANIFEST b/mozilla/content/base/public/MANIFEST
index 1c2f80669b9..d7038c9e690 100644
--- a/mozilla/content/base/public/MANIFEST
+++ b/mozilla/content/base/public/MANIFEST
@@ -10,7 +10,6 @@ nsIContent.h
 nsIContentIterator.h
 nsIContentSerializer.h
 nsIDocument.h
-nsIDocumentContainer.h
 nsIDocumentEncoder.h
 nsIDocumentObserver.h
 nsIDocumentViewer.h
diff --git a/mozilla/content/base/public/Makefile.in b/mozilla/content/base/public/Makefile.in
index 1ae072fa1d6..7561939de76 100644
--- a/mozilla/content/base/public/Makefile.in
+++ b/mozilla/content/base/public/Makefile.in
@@ -39,7 +39,6 @@ nsContentErrors.h \
 nsContentPolicyUtils.h \
 nsContentUtils.h \
 nsIDocument.h \
-nsIDocumentContainer.h \
 nsIDocumentEncoder.h \
 nsIDocumentObserver.h \
 nsIDocumentViewer.h \
diff --git a/mozilla/content/base/public/nsIDocument.h b/mozilla/content/base/public/nsIDocument.h
index ca15c7c4070..5e41e12f234 100644
--- a/mozilla/content/base/public/nsIDocument.h
+++ b/mozilla/content/base/public/nsIDocument.h
@@ -48,7 +48,6 @@
 class nsIAtom;
 class nsIArena;
 class nsIContent;
-class nsIDocumentContainer;
 class nsIDocumentObserver;
 class nsIPresContext;
 class nsIPresShell;
diff --git a/mozilla/content/base/public/nsIDocumentContainer.h b/mozilla/content/base/public/nsIDocumentContainer.h
deleted file mode 100644
index d95c3e430b1..00000000000
--- a/mozilla/content/base/public/nsIDocumentContainer.h
+++ /dev/null
@@ -1,91 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* ***** BEGIN LICENSE BLOCK *****
- * Version: NPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.1 (the "License"); you may not use this file except in
- * compliance with the License. You may obtain a copy of the License at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is mozilla.org code.
- *
- * The Initial Developer of the Original Code is 
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the NPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the NPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-#ifndef nsIDocumentContainer_h___
-#define nsIDocumentContainer_h___
-
-#include "nsISupports.h"
-class nsIScriptable;
-class nsIScriptEnvironment;
-class nsIURI;
-
-#define NS_IDOCUMENT_CONTAINER_IID \
-{ 0x8efd4470, 0x944d, 0x11d1,      \
-  {0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
-
-class nIDocumentContainer : public nsISupports {
-public:
-  /**
-   * Display the specified URL with the given connection.
-   *
-   * @param url the URL to display
-   * @param connection the connection to use.
-   */
-  virtual void Display(nsIURI* aURL) = 0;
-
-  /**
-   * Returns a script environment for the specified language and version.
-   * The expectation is that the script environment already has been
-   * set up with a container object. If a script environment has already
-   * been requested for the given language, the same instance should
-   * be returned.
-   *
-   * @param language the scripting language for the environment. If this
-   *        is null, returns the default scripting environment.
-   * @param majorVersion the major version number of the language
-   * @param minorVersion the minor version number of the language
-   * @return the script environment for the language
-   * @see mg.magellan.script.IScriptEnvrionment
-   */
-  virtual nsIScriptEnvironment*
-    GetScriptEnvironment(nsString* aLanguage,
-                         PRInt32 aMajorVersion,
-                         PRInt32 aMinorVersion) = 0;
-
-  /**
-   * Returns the scriptable container object for the document container.
-   * The scriptable object will be used as the scoping object in the
-   * definition of scriptable classes used in the Document Object Model.
-   *
-   * @return the scriptable container for the application
-   * @see mg.magellan.script.IScriptable
-   * @see mg.magellan.script.IScriptEnvrionment
-   */
-  virtual nsIScriptable* GetScriptableContainer() = 0;
-};
-
-#endif /* nsIDocumentContainer_h___ */