Is there any way to see webp foto from thunar with XFCE DE? There was a similar question, but it was about nautilus. Then to get webp thumbs a tumbler (the Xfce thumbnailing service) must support, and there nothing. Then for open pictures a some viewer must know webp.
I experienced a ristretto, gpicview, viewnior and they all say something like: error of interpretation of the image file format jpeg