For best results with animated images, try using the "IE 11" button. That will re-request the original URL for the image as a dumb browser incompatible with WebP. That doesn't work on all sites, but it's worth a try.

If you are noticing that a specific site doesn't work with the "IE 11" button, could you share a link? You can send it by email jscher2000@outlook.com or create an issue at https://github.com/jscher2000/Save-webP-as-extension/issues. Thanks.