@TrollDecker Why don't you share it with us? 😉
@TrollDecker Ah… tbf though, file types really shouldn't be detected by extension. We have magic for that. I'd open an issue. https://en.m.wikipedia.org/wiki/List_of_file_signatures
@anomie The Mastodon software seems to handle it fine, it's just when I open the image in a new tab that it tried to download it as a binary, so I think the issue would need to be raised with Mozilla.
@anomie Because I'd rather not encourage that potential dogpile. :zipper_mouth: