text/html; firefox %s &>/dev/null; test=test -n "$DISPLAY"; needsterminal
text/html; w3m -I %{charset} -O utf-8 -T text/html -dump %s; copiousoutput
text/plain; less %s
application/x-pdf; zathura %s
application/pdf; zathura %s
application/octet-stream; zathura %s
image/jpeg; feh %s
image/pjpeg; feh %s
image/png; feh %s
image/gif; feh %s