--- firefox-24.2.0-old.ebuild   2014-01-29 16:31:35.140057988 +1300
+++ firefox-24.2.0.ebuild       2014-01-29 16:33:18.390077233 +1300
@@ -148,6 +148,9 @@
        EPATCH_FORCE="yes" \
        epatch "${WORKDIR}/firefox"

+       # Fix missing build options
+       epatch "${FILESDIR}/Makefile-pgo.patch
+
        # Allow user to apply any additional patches without modifing ebuild
        epatch_user

@@ -232,7 +235,7 @@

        # 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

        # Finalize and report settings