nnn/config.def.h

/* Configuration */
struct assoc assocs[] = {
	{ "\\.(avi|mp4|mkv|mp3|ogg)$", "mplayer" },
	{ "\\.(png|jpg|gif)$", "feh" },
	{ "\\.(html|svg)$", "firefox" },
	{ "\\.pdf$", "mupdf" },
	{ "\\.sh$", "sh" },
	{ ".*", "less" },
};