diff --git a/dom/base/DOMException.cpp b/dom/base/DOMException.cpp
index 2fcc367faea9..7dcd13709ff9 100644
--- a/dom/base/DOMException.cpp
+++ b/dom/base/DOMException.cpp
@@ -12,7 +12,6 @@
 #include "nsContentUtils.h"
 #include "nsCOMPtr.h"
 #include "nsIDocument.h"
-#include "nsIDOMDOMException.h"
 #include "nsIException.h"
 #include "nsMemory.h"
 #include "xpcprivate.h"
@@ -356,12 +355,6 @@ Exception::Stringify(JSContext* aCx, nsString& retval)
   CopyUTF8toUTF16(str, retval);
 }
 
-NS_IMPL_ADDREF_INHERITED(DOMException, Exception)
-NS_IMPL_RELEASE_INHERITED(DOMException, Exception)
-NS_INTERFACE_MAP_BEGIN(DOMException)
-  NS_INTERFACE_MAP_ENTRY(nsIDOMDOMException)
-NS_INTERFACE_MAP_END_INHERITING(Exception)
-
 DOMException::DOMException(nsresult aRv, const nsACString& aMessage,
                            const nsACString& aName, uint16_t aCode)
   : Exception(aMessage, aRv, aName, nullptr, nullptr),
diff --git a/dom/base/DOMException.h b/dom/base/DOMException.h
index 5cfd9d043f0f..25eb0df3d64e 100644
--- a/dom/base/DOMException.h
+++ b/dom/base/DOMException.h
@@ -18,7 +18,6 @@
 #include "nsCOMPtr.h"
 #include "nsCycleCollectionParticipant.h"
 #include "nsID.h"
-#include "nsIDOMDOMException.h"
 #include "nsWrapperCache.h"
 #include "nsIException.h"
 #include "nsString.h"
@@ -144,15 +143,13 @@ protected:
 
 NS_DEFINE_STATIC_IID_ACCESSOR(Exception, MOZILLA_EXCEPTION_IID)
 
-class DOMException : public Exception,
-                     public nsIDOMDOMException
+class DOMException : public Exception
 {
 public:
   DOMException(nsresult aRv, const nsACString& aMessage,
                const nsACString& aName, uint16_t aCode);
 
-  NS_DECL_ISUPPORTS_INHERITED
-  NS_DECL_NSIDOMDOMEXCEPTION
+  NS_INLINE_DECL_REFCOUNTING_INHERITED(DOMException, Exception)
 
   // nsWrapperCache overrides
   virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
diff --git a/dom/interfaces/core/moz.build b/dom/interfaces/core/moz.build
index a807ade9b748..0f0c4de63980 100644
--- a/dom/interfaces/core/moz.build
+++ b/dom/interfaces/core/moz.build
@@ -10,7 +10,6 @@ with Files("**"):
 XPIDL_SOURCES += [
     'nsIDOMDocument.idl',
     'nsIDOMDocumentFragment.idl',
-    'nsIDOMDOMException.idl',
     'nsIDOMElement.idl',
     'nsIDOMNode.idl',
     'nsIDOMNodeList.idl',
diff --git a/dom/interfaces/core/nsIDOMDOMException.idl b/dom/interfaces/core/nsIDOMDOMException.idl
deleted file mode 100644
index 4b1d5e3e5186..000000000000
--- a/dom/interfaces/core/nsIDOMDOMException.idl
+++ /dev/null
@@ -1,24 +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"
-
-/**
- * In general, DOM methods return specific error values in ordinary
- * processing situations, such as out-of-bound errors.
- * However, DOM operations can raise exceptions in "exceptional"
- * circumstances, i.e., when an operation is impossible to perform
- * (either for logical reasons, because data is lost, or because the
- * implementation has become unstable)
- *
- * For more information on this interface please see
- * http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#domexception
- */
-
-[uuid(5bd766d3-57a9-4833-995d-dbe21da29595)]
-interface nsIDOMDOMException : nsISupports
-{
-};
-
diff --git a/dom/ipc/StructuredCloneData.cpp b/dom/ipc/StructuredCloneData.cpp
index e0fb5c17fbfd..e88a1cf0deeb 100644
--- a/dom/ipc/StructuredCloneData.cpp
+++ b/dom/ipc/StructuredCloneData.cpp
@@ -6,7 +6,6 @@
 
 #include "StructuredCloneData.h"
 
-#include "nsIDOMDOMException.h"
 #include "nsIMutable.h"
 #include "nsIXPConnect.h"
 
diff --git a/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp b/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp
index f3368e765ece..18f7f94a0a51 100644
--- a/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp
+++ b/xpcom/reflect/xptinfo/ShimInterfaceInfo.cpp
@@ -7,7 +7,6 @@
 
 #include "ShimInterfaceInfo.h"
 
-#include "nsIDOMDOMException.h"
 #include "nsIDOMDOMRequest.h"
 #include "nsIDOMDocument.h"
 #include "nsIDOMDocumentFragment.h"
@@ -35,7 +34,6 @@
 #include "mozilla/dom/CSSStyleSheetBinding.h"
 #include "mozilla/dom/CSSValueBinding.h"
 #include "mozilla/dom/CSSValueListBinding.h"
-#include "mozilla/dom/DOMExceptionBinding.h"
 #include "mozilla/dom/DOMParserBinding.h"
 #include "mozilla/dom/DOMRequestBinding.h"
 #include "mozilla/dom/DocumentBinding.h"
@@ -128,7 +126,6 @@ struct ComponentsInterfaceShimEntry {
 const ComponentsInterfaceShimEntry kComponentsInterfaceShimMap[] =
 {
   DEFINE_SHIM_WITH_CUSTOM_INTERFACE(nsIContentFrameMessageManager, ContentFrameMessageManager),
-  DEFINE_SHIM(DOMException),
   DEFINE_SHIM(DOMRequest),
   DEFINE_SHIM(Document),
   DEFINE_SHIM(DocumentFragment),