image/*; cat - | open -W -F -n %s > /dev/null
text/html; cat %s > %s.html && /Users/pks/local_bin/open-in-browser %s.html
text/html; w3m -I %{charset} -O utf-8 -T text/html -dump %s; copiousoutput
text/*; cat - | open -W -F -n %s > /dev/null
application/*; cat - | open %s >/dev/null