Requirements:
  überzug (https://github.com/ueber-devel/ueberzug)
  jq
  atool
  poppler
  djvulibre
  pandoc
  lynx
  imagemagick
  source-highlight
  ffmpegthumbnailer

An example opener has also been included in this repository
Opener requirements:
  atool
  zathura
  libreoffice
  firefox
  lynx
  inkscape
  fluidsynth
  mpv
  mpvc (https://github.com/neeshy/mpvc)
  flashplayer
  nsxiv
  gimp