25789616 Firefox is built with pulseaudio disabled.
--- a/components/desktop/firefox/Makefile Mon Mar 27 14:27:31 2017 -0700
+++ b/components/desktop/firefox/Makefile Mon Mar 27 13:41:19 2017 -0700
@@ -102,7 +102,7 @@
echo "ac_add_options --enable-jemalloc" >> $(MOZCONFIG) ; \
echo "ac_add_options --enable-xinerama" >> $(MOZCONFIG) ; \
echo "ac_add_options --disable-crashreporter" >> $(MOZCONFIG) ; \
- echo "ac_add_options --disable-pulseaudio" >> $(MOZCONFIG) ; \
+ echo "ac_add_options --enable-pulseaudio" >> $(MOZCONFIG) ; \
echo "ac_add_options --enable-gstreamer=1.0" >> $(MOZCONFIG) ; \
echo "ac_add_options --with-intl-api" >> $(MOZCONFIG) ; \
echo "ac_add_options --enable-system-libffi" >> $(MOZCONFIG) ; \