text/html;                  w3m -I %{charset} -T text/html; copiousoutput;
text/plain;                 surf '%s'; test=test -n "$DISPLAY"; needsterminal;
application/json;           jq . %s | less -N; copiousoutput;
application/pdf;            firefox '%s'; test=test -n "$DISPLAY"; needsterminal;
application/octet-stream;   firefox '%s'; test=test -n "$DISPLAY"; needsterminal;
application/zip;            unzip -p '%s' | less -N
application/gzip;           gunzip -c '%s' | less -N
image/png;                  feh '%s'
image/jpg;                  feh '%s'
image/jpeg;                 feh '%s'
image/gif;                  feh '%s'