[Default Applications]
text/html=firefox.desktop
x-scheme-handler/http=firefox.desktop
x-scheme-handler/https=firefox.desktop

image/jpeg=org.gnome.eog.desktop.desktop
image/png=org.gnome.eog.desktop.desktop
image/gif=org.gnome.eog.desktop.desktop
image/webp=org.gnome.eog.desktop.desktop
image/svg+xml=org.gnome.eog.desktop.desktop

video/mp4=mpv.desktop
video/x-matroska=mpv.desktop
video/webm=mpv.desktop
video/x-msvideo=mpv.desktop

audio/mpeg=music-player.desktop
audio/ogg=music-player.desktop
audio/flac=music-player.desktop
audio/wav=music-player.desktop