Requested feature overview description.
WebP is an image format that can compress images more efficiently than JPEG .
Why would it be useful?
Original WebP files can be uploaded instead of converting those to JPEG (and adding generation loss) or PNG (and making those oversized). In order to keep compatibility with older hardware and software i suggest using JPEG downscaled previews as default.
What part(s) of the site page(s) are affected?