some idiot Chromium engineer who worked on webp is blocking it from being put in. see jpegxl.info

on desktop install https://chrome.google.com/webstore/detail/jpeg-xl-viewer/bkhdlfmkaenamnlbpdfplekldlnghchp

on mobile choose a browser that has it already. Cromite is a good option https://github.com/uazo/cromite

iOS and Firefox users don't need to bother