Is there a FAQ that lists the image file formats that are acceptable to the uploader? I found
meta.stackexchange.com/q/99734/334566 &
meta.stackexchange.com/q/81400/334566 but they don't have that info. I know that PNG, JPEG, and GIF are supported. Are there others? I just tried to inline a newbie's .webp file which is hosted on imgur, and it didn't work. So I ended up downloading it & converting it, which is a bit tedious to do on the phone.