--- b/browser/app/Makefile.in	2016-02-14 15:57:50.000000000 +0100
+++ a/browser/app/Makefile.in	2016-02-14 16:08:29.823744590 +0100
@@ -56,8 +56,9 @@
 # steps. See bug 1431342.
 libs:: $(srcdir)/profile/channel-prefs.js
 	$(NSINSTALL) -D $(DIST)/bin/defaults/pref
+	cp $(topsrcdir)/../kde.js $(DIST)/bin/defaults/pref/kde.js	
 	$(call py_action,preprocessor,-Fsubstitution $(PREF_PPFLAGS) $(ACDEFINES) $^ -o $(DIST)/bin/defaults/pref/channel-prefs.js)
 
 ifeq (cocoa,$(MOZ_WIDGET_TOOLKIT))