diff --git a/dom/base/NodeIterator.cpp b/dom/base/NodeIterator.cpp
index d7bc69e53725..8fca891800ba 100644
--- a/dom/base/NodeIterator.cpp
+++ b/dom/base/NodeIterator.cpp
@@ -5,7 +5,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * Implementation of DOM Traversal's nsIDOMNodeIterator
+ * Implementation of DOM Traversal's NodeIterator
  */
 
 #include "mozilla/dom/NodeIterator.h"
@@ -171,9 +171,8 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
 
 // QueryInterface implementation for NodeIterator
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(NodeIterator)
-    NS_INTERFACE_MAP_ENTRY(nsIDOMNodeIterator)
     NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
-    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMNodeIterator)
+    NS_INTERFACE_MAP_ENTRY(nsISupports)
 NS_INTERFACE_MAP_END
 
 NS_IMPL_CYCLE_COLLECTING_ADDREF(NodeIterator)
diff --git a/dom/base/NodeIterator.h b/dom/base/NodeIterator.h
index 6c61fd7fce17..8a2e3b9cecce 100644
--- a/dom/base/NodeIterator.h
+++ b/dom/base/NodeIterator.h
@@ -5,13 +5,12 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * Implementation of DOM Traversal's nsIDOMNodeIterator
+ * Implementation of DOM Traversal's NodeIterator
  */
 
 #ifndef mozilla_dom_NodeIterator_h
 #define mozilla_dom_NodeIterator_h
 
-#include "nsIDOMNodeIterator.h"
 #include "nsTraversal.h"
 #include "nsCycleCollectionParticipant.h"
 #include "nsStubMutationObserver.h"
@@ -22,13 +21,11 @@ class nsIDOMNode;
 namespace mozilla {
 namespace dom {
 
-class NodeIterator final : public nsIDOMNodeIterator,
-                           public nsTraversal,
-                           public nsStubMutationObserver
+class NodeIterator final : public nsStubMutationObserver,
+                           public nsTraversal
 {
 public:
     NS_DECL_CYCLE_COLLECTING_ISUPPORTS
-    NS_DECL_NSIDOMNODEITERATOR
 
     NodeIterator(nsINode *aRoot,
                  uint32_t aWhatToShow,
@@ -36,7 +33,7 @@ public:
 
     NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
 
-    NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(NodeIterator, nsIDOMNodeIterator)
+    NS_DECL_CYCLE_COLLECTION_CLASS(NodeIterator)
 
     // WebIDL API
     nsINode* Root() const
diff --git a/dom/interfaces/traversal/moz.build b/dom/interfaces/traversal/moz.build
index a4d4e778f10c..f3099ca2cdd5 100644
--- a/dom/interfaces/traversal/moz.build
+++ b/dom/interfaces/traversal/moz.build
@@ -9,7 +9,6 @@ with Files("**"):
 
 XPIDL_SOURCES += [
     'nsIDOMNodeFilter.idl',
-    'nsIDOMNodeIterator.idl',
     'nsIDOMTreeWalker.idl',
 ]
 
diff --git a/dom/interfaces/traversal/nsIDOMNodeIterator.idl b/dom/interfaces/traversal/nsIDOMNodeIterator.idl
deleted file mode 100644
index 22375aac3684..000000000000
--- a/dom/interfaces/traversal/nsIDOMNodeIterator.idl
+++ /dev/null
@@ -1,15 +0,0 @@
-/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "domstubs.idl"
-
-interface nsIDOMNodeFilter;
-
-[uuid(a86bdac9-ff89-4c94-8160-4fe86733bab8)]
-// Introduced in DOM Level 2, updated to DOM Level 4:
-interface nsIDOMNodeIterator : nsISupports
-{
-};
diff --git a/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp b/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp
index 1bd136764821..271b08001866 100644
--- a/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp
+++ b/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp
@@ -46,7 +46,6 @@
 #include "nsIDOMMouseScrollEvent.h"
 #include "nsIDOMMutationEvent.h"
 #include "nsIDOMNode.h"
-#include "nsIDOMNodeIterator.h"
 #include "nsIDOMNodeList.h"
 #include "nsIDOMNotifyPaintEvent.h"
 #include "nsIDOMNSEvent.h"
@@ -136,7 +135,6 @@
 #include "mozilla/dom/MouseEventBinding.h"
 #include "mozilla/dom/MouseScrollEventBinding.h"
 #include "mozilla/dom/MutationEventBinding.h"
-#include "mozilla/dom/NodeIteratorBinding.h"
 #include "mozilla/dom/NodeListBinding.h"
 #include "mozilla/dom/NodeBinding.h"
 #include "mozilla/dom/NotifyPaintEventBinding.h"
@@ -272,7 +270,6 @@ const ComponentsInterfaceShimEntry kComponentsInterfaceShimMap[] =
   DEFINE_SHIM(MouseEvent),
   DEFINE_SHIM(MouseScrollEvent),
   DEFINE_SHIM(MutationEvent),
-  DEFINE_SHIM(NodeIterator),
   DEFINE_SHIM(NodeList),
   DEFINE_SHIM(Node),
   DEFINE_SHIM(NotifyPaintEvent),