DotMailcap

text/html; firefox -no-remote %s; test=test "$DISPLAY" != ""
text/html; /usr/bin/w3m -dump -I %{charset} -T text/html '%s'; copiousoutput; description=HTML Text; nametemplate=%s.html
text/html; /usr/bin/w3m -I %{charset} -T text/html '%s'; needsterminal; description=HTML Text; nametemplate=%s.html
image/*; eog %s