Using Firefox, I uploaded a favicon.ico file (1KB in size) pulled from a website, and the spinner icon has been spinning for a few minutes now. It seems like it

Using Firefox, I uploaded a favicon.ico file (1KB in size) pulled from a website, and the spinner icon has been spinning for a few minutes now. It seems like it doesn't work with Firefox and/or with favicon.ico and/or files that are of that size. For ease of use, I'd prefer that this page also accept a URL to an image or icon on the Internet.