>>41168149I get the same thing, but I usually just download them in bulk with this so I never tried fixing it.
https://github.com/furyutei/twMediaDownloaderJust checked google and you can edit the registry on windows to make it save as jpg again.
>Open registry editor and then copy & paste the next thing into the address bar.>Computer\HKEY_CLASSES_ROOT\MIME\Database\Content Type\image/jpeg> Double-click "Extension" and change ".jfif" to ".jpg" click ok and you're done.