diff -r b8f1c62354df -r 246b98b59979 mozilla-i586-domPrefs.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mozilla-i586-domPrefs.patch	Tue Mar 27 08:29:31 2018 +0200
@@ -0,0 +1,27 @@
+# HG changeset patch
+# User Andrea Marchesini <amarchesini@mozilla.com>
+# Parent  bb4eb640e7303ea68be982d824aa100caacce240
+Mozilla Bug#1447409 - DOMPrefs.h must be included in WorkerScope, r=qdot
+                      To fix 32bit build error for i586 target.
+
+diff --git a/dom/workers/WorkerScope.h b/dom/workers/WorkerScope.h
+--- a/dom/workers/WorkerScope.h
++++ b/dom/workers/WorkerScope.h
+@@ -4,16 +4,17 @@
+  * 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/. */
+ 
+ #ifndef mozilla_dom_workerscope_h__
+ #define mozilla_dom_workerscope_h__
+ 
+ #include "Workers.h"
+ #include "mozilla/DOMEventTargetHelper.h"
++#include "mozilla/dom/DOMPrefs.h"
+ #include "mozilla/dom/Headers.h"
+ #include "mozilla/dom/RequestBinding.h"
+ #include "nsWeakReference.h"
+ #include "mozilla/dom/ImageBitmapSource.h"
+ 
+ namespace mozilla {
+ namespace dom {
+