I don’t know what a .webp file is but I don’t like it. They’re like a filthy prank version of the image/gif you’re looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.
Edit: honestly I assumed it had something to do with Google protecting themselves from image piracy shit
Yes, because webp images are smaller while having similar quality than jpeg. On some images is greater reduction than on others.
So websites and CDNs are using webp to speed up delivery and reduce download size.
But yes, software support is not complete.