Fun fact: the "Your browser support avif" image in that post at https://jfhr.me/your-browser-supports.avif https://jfhr.me/your-browser-supports.avif is current

Fun fact: the "Your browser support avif" image in that post at https://jfhr.me/your-browser-supports.avif https://jfhr.me/your-browser-supports.avif is currently... a png file. $ curl -s https://jfhr.me/your-browser-supports.avif | file - /dev/stdin: PNG image data, 400 x 100, 8-bit grayscale, non-interlaced (same for the jxl one, but firefox apparently doesn't try to load it because of the type. The webp and jpeg ones are what they say they are.)