--- firefox-48.0.ebuild.orig	2016-08-06 09:55:07.000000000 +0300
+++ firefox-48.0.ebuild	2016-08-08 13:11:00.000000000 +0300
@@ -115,7 +115,8 @@
 
 src_prepare() {
 	# Apply our patches
-	eapply "${WORKDIR}/firefox"
+	eapply "${WORKDIR}/firefox" \
+		"${FILESDIR}"/${PN}-48.0-pgo.patch
 #		"${FILESDIR}"/${PN}-45-qt-widget-fix.patch
 
 	if ! tc-ld-is-gold && has_version ">=sys-devel/binutils-2.26" ; then
@@ -203,7 +204,7 @@
 
 	# Allow for a proper pgo build
 	if use pgo; then
-		echo "mk_add_options PROFILE_GEN_SCRIPT='\$(PYTHON) \$(OBJDIR)/_profile/pgo/profileserver.py'" >> "${S}"/.mozconfig
+		echo "mk_add_options PROFILE_GEN_SCRIPT='EXTRA_TEST_ARGS=10 \$(MAKE) -C \$(MOZ_OBJDIR) pgo-profile-run'" >> "${S}"/.mozconfig
 	fi
 
 	echo "mk_add_options MOZ_OBJDIR=${BUILD_OBJ_DIR}" >> "${S}"/.mozconfig