There is an AVIF polyfill, but it has lots of important edge cases. https://github.com/Kagami/avif.js https://github.com/Kagami/avif.js I'd rather keep it sim

There is an AVIF polyfill, but it has lots of important edge cases. https://github.com/Kagami/avif.js https://github.com/Kagami/avif.js I'd rather keep it simple and not deal with more JS, and I'm OK with using JPEG for now. (I've been using mozJPEG for years)