Custom thumbnails for unknown formats in Gnome

Photo by Jess Bailey on Unsplash

I just found out something cool today about file thumbnails in Linux. They of course follow a standard! It is defined by freedesktop and it bears the self-descriptive name Thumbnail Managing Standard. It establishes paths for thumbnails, thumbnail creation definitions and so on. Most Linux desktop environments follow this standard except KDE, at least the fifth version, so we get to edit and configure the…