You can use any image format. Try using an animated gif. I don't know what this is but it's huge. https://news.ycombinator.com/favicon.ico https://news.ycombi

You can use any image format. Try using an animated gif. I don't know what this is but it's huge. https://news.ycombinator.com/favicon.ico https://news.ycombinator.com/favicon.ico