https://mail.gnome.org/archives/nautilus-list/2003-March/msg00171.html
Re: Better PDF/PS/Dia thumbnailers
betterpdfpsdia
https://archlinux.org/packages/extra/x86_64/kdegraphics-thumbnailers/files/
Arch Linux - kdegraphics-thumbnailers 26.04.1-1 (x86_64) - File List
arch linux
https://lists.debian.org/debian-xfce/2009/07/msg00081.html
[Pkg-xfce-devel] Bug#530203: Bug#530203: thunar-thumbnailers: bashism in /bin/sh script
https://apps.kde.org/kdegraphics_thumbnailers/
kdegraphics-thumbnailers - KDE Applications
Graphics file format thumbnailers for KDE applications
kdeapplications