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
JPEG-XL has been out for three years, and is better and more efficient than any other image format on the market. Google just has been insisting on keeping them off the web because they want to push WebP instead.