Webp icon desktop shortcuts - webp image is not display - missing library

Create a desktop shortcut, for example:

webpTest.desktop with

[Desktop Entry]
Version=1.0
Type=Application
Comment=
Exec=/usr/bin/Thunar
Icon=SOME_VALID_PATH_TO_A_webp_IMG
Path=SOME_VALID_PATH
Terminal=false
StartupNotify=false

You’ll notice that webp image format is not taken into account, while ok with png or jpg

Manjaro XFCE lacks by default the tiny (15Kb) GitHub - aruiz/webp-pixbuf-loader: WebP Image format GdkPixbuf loader

See: webp icon desktop shortcuts - webp image is not display - v 4.16 (#113) · Issues · Xfce / xfdesktop · GitLab