[Daemon404]

Chrome does seem to save the JPEG version on some WebP or AVIF URLs where there is also a JPEG version available too, although it seems to be 'clever' about it rather than explicitly offering the option, which can make saving the actual WebP or AVIF mildly annoying.

[traspler]

I've noticed this too but I couldn't determine any clear patterns. It's also very confusing when the file ending in the URL does not match what I download (that's why an explicit "save as" might be better than an implicit auto conversion). I think I also had situations where it did the opposite, download the webp even though the URL had jpeg in the name. I assumed that it's the webserver serving the image being too clever.