diff --git a/b2g/installer/package-manifest.in b/b2g/installer/package-manifest.in
index 406392dfb62a..1aa96719928e 100644
--- a/b2g/installer/package-manifest.in
+++ b/b2g/installer/package-manifest.in
@@ -177,7 +177,6 @@
 #endif
 @BINPATH@/components/dom_camera.xpt
 @BINPATH@/components/dom_canvas.xpt
-@BINPATH@/components/dom_contacts.xpt
 @BINPATH@/components/dom_alarm.xpt
 @BINPATH@/components/dom_core.xpt
 @BINPATH@/components/dom_css.xpt
diff --git a/browser/installer/package-manifest.in b/browser/installer/package-manifest.in
index 2538fec5e6a0..02b6967d10e9 100644
--- a/browser/installer/package-manifest.in
+++ b/browser/installer/package-manifest.in
@@ -187,7 +187,6 @@
 #endif
 @BINPATH@/components/dom_camera.xpt
 @BINPATH@/components/dom_canvas.xpt
-@BINPATH@/components/dom_contacts.xpt
 @BINPATH@/components/dom_alarm.xpt
 @BINPATH@/components/dom_core.xpt
 @BINPATH@/components/dom_css.xpt
diff --git a/dom/interfaces/contacts/moz.build b/dom/interfaces/contacts/moz.build
deleted file mode 100644
index 234041557533..000000000000
--- a/dom/interfaces/contacts/moz.build
+++ /dev/null
@@ -1,14 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-XPIDL_SOURCES += [
-    'nsIDOMMozContactChangeEvent.idl'
-]
-
-XPIDL_MODULE = 'dom_contacts'
-
-MODULE = 'dom'
-
diff --git a/dom/interfaces/contacts/nsIDOMMozContactChangeEvent.idl b/dom/interfaces/contacts/nsIDOMMozContactChangeEvent.idl
deleted file mode 100644
index 335983000f34..000000000000
--- a/dom/interfaces/contacts/nsIDOMMozContactChangeEvent.idl
+++ /dev/null
@@ -1,24 +0,0 @@
-/* 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 "nsIDOMEvent.idl"
-
-[scriptable, builtinclass, uuid(7ee758eb-9353-4ade-8715-9953ea512ee2)]
-interface nsIDOMMozContactChangeEvent : nsIDOMEvent
-{
-  readonly attribute DOMString contactID;
-  readonly attribute DOMString reason;
-
-  [noscript] void initMozContactChangeEvent(in DOMString aType,
-                                            in boolean aCanBubble,
-                                            in boolean aCancelable,
-                                            in DOMString aContactID,
-                                            in DOMString aReason);
-};
-
-dictionary MozContactChangeEventInit : EventInit
-{
-  DOMString contactID;
-  DOMString reason;
-};
diff --git a/dom/moz.build b/dom/moz.build
index fa81912aaa4c..4ec960bd184b 100644
--- a/dom/moz.build
+++ b/dom/moz.build
@@ -11,7 +11,6 @@ interfaces = [
     'html',
     'events',
     'devicestorage',
-    'contacts',
     'settings',
     'stylesheets',
     'sidebar',
diff --git a/dom/webidl/MozContactChangeEvent.webidl b/dom/webidl/MozContactChangeEvent.webidl
index d31087276727..95b695b2a78a 100644
--- a/dom/webidl/MozContactChangeEvent.webidl
+++ b/dom/webidl/MozContactChangeEvent.webidl
@@ -4,7 +4,7 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-[Constructor(DOMString type, optional MozContactChangeEventInit eventInitDict), HeaderFile="GeneratedEventClasses.h"]
+[Constructor(DOMString type, optional MozContactChangeEventInit eventInitDict)]
 interface MozContactChangeEvent : Event
 {
   readonly attribute DOMString? contactID;
diff --git a/dom/webidl/moz.build b/dom/webidl/moz.build
index 3d40287a3bec..155dbc6ebbf9 100644
--- a/dom/webidl/moz.build
+++ b/dom/webidl/moz.build
@@ -471,7 +471,6 @@ WEBIDL_FILES += [
     'ElementReplaceEvent.webidl',
     'HashChangeEvent.webidl',
     'MozApplicationEvent.webidl',
-    'MozContactChangeEvent.webidl',
     'MozMmsEvent.webidl',
     'MozSettingsEvent.webidl',
     'MozSmsEvent.webidl',
@@ -539,6 +538,7 @@ GENERATED_EVENTS_WEBIDL_FILES = [
     'DeviceLightEvent.webidl',
     'DeviceProximityEvent.webidl',
     'MediaStreamEvent.webidl',
+    'MozContactChangeEvent.webidl',
     'MozInterAppMessageEvent.webidl',
     'RTCDataChannelEvent.webidl',
     'RTCPeerConnectionIceEvent.webidl',
diff --git a/js/xpconnect/src/event_impl_gen.conf.in b/js/xpconnect/src/event_impl_gen.conf.in
index 6d2361f43c62..f952b67a2246 100644
--- a/js/xpconnect/src/event_impl_gen.conf.in
+++ b/js/xpconnect/src/event_impl_gen.conf.in
@@ -17,7 +17,6 @@ simple_events = [
     'PopStateEvent',
     'HashChangeEvent',
     'CloseEvent',
-    'MozContactChangeEvent',
     'DeviceOrientationEvent',
     'MozApplicationEvent',
     'SmartCardEvent',
diff --git a/mobile/android/installer/package-manifest.in b/mobile/android/installer/package-manifest.in
index cafba2972ac6..263b5a49fe4d 100644
--- a/mobile/android/installer/package-manifest.in
+++ b/mobile/android/installer/package-manifest.in
@@ -135,7 +135,6 @@
 @BINPATH@/components/dom_camera.xpt
 @BINPATH@/components/dom_canvas.xpt
 @BINPATH@/components/dom_core.xpt
-@BINPATH@/components/dom_contacts.xpt
 @BINPATH@/components/dom_css.xpt
 @BINPATH@/components/dom_devicestorage.xpt
 @BINPATH@/components/dom_events.xpt