diff -up firefox-4.0.1/mozilla-2.0/browser/build.mk.stub firefox-4.0.1/mozilla-2.0/browser/build.mk
--- firefox-4.0.1/mozilla-2.0/browser/build.mk.stub	2011-04-14 07:28:21.000000000 +0200
+++ firefox-4.0.1/mozilla-2.0/browser/build.mk	2011-05-10 11:33:21.343196025 +0200
@@ -53,7 +53,7 @@ ifdef MOZ_SERVICES_SYNC
 tier_app_dirs += services
 endif
 
-tier_app_dirs += browser
+tier_app_dirs += browser xulrunner
 # Never add other tier_app_dirs after browser. They won't get packaged
 # properly on mac.
 
diff -up firefox-4.0.1/mozilla-2.0/xulrunner/Makefile.in.stub firefox-4.0.1/mozilla-2.0/xulrunner/Makefile.in
--- firefox-4.0.1/mozilla-2.0/xulrunner/Makefile.in.stub	2011-04-14 07:28:50.000000000 +0200
+++ firefox-4.0.1/mozilla-2.0/xulrunner/Makefile.in	2011-05-10 11:33:21.343196025 +0200
@@ -44,10 +44,7 @@ VPATH     = @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 PARALLEL_DIRS = \
-  app \
-  setup \
   stub \
-  examples \
   $(NULL)
 
 ifeq ($(OS_ARCH),WINNT)
diff -up firefox-4.0.1/mozilla-2.0/xulrunner/stub/Makefile.in.stub firefox-4.0.1/mozilla-2.0/xulrunner/stub/Makefile.in
--- firefox-4.0.1/mozilla-2.0/xulrunner/stub/Makefile.in.stub	2011-05-10 11:38:26.000000000 +0200
+++ firefox-4.0.1/mozilla-2.0/xulrunner/stub/Makefile.in	2011-05-10 11:38:35.054399530 +0200
@@ -101,7 +101,7 @@ WIN32_EXE_LDFLAGS += -ENTRY:wmainCRTStar
 endif
 endif
 
-LIBS += $(JEMALLOC_LIBS)
+#LIBS += $(JEMALLOC_LIBS)
 
 include $(topsrcdir)/config/rules.mk