A week or few ago, I asked about the issue with certain image posts opening in a new tab instead of expanding when I click. It was in a random post affected by the new tab issue and I never got a response, at least I don't think I did.

Now that you mentioned avif, I double-checked, and sure enough that's the reason. I don't know why I didn't notice.

A while back it happened with images hosted on something called catbox or shitbox whatever it was called. For awhile the images wouldn't load at all in my browsers because the certificate for that domain was bad. Then for awhile, I suppose after they fixed the cert, they'd open up in a new tab instead of expand. But, it's been some time since I've noticed and I don't see many/any shitbox/catbox hosted images anymore.

Sort of same, only I don't have any issues with it on Lemmy, only everywhere else. Anytime I try downloading an image I swear it's always an avif and the group chat I use doesn't support avif, so I have to screenshot it real quick if I want to share any memes. Idk if it's Lemmy putting things as avif, or if there's a couple people in the shit posting community who exclusively posts avif, but I hate it.