Board Thread:Support Requests - Getting Technical/@comment-36905853-20190530161412/@comment-9605025-20190531011042

Just to put my two cents in...

This page from Mozilla pretty much sums up the restrictions Applemasterexpert and Fngplg mentioned. Some notable things to add to what has already been said: Also, a quick online search seems to suggest the most browsers (except IE), should be able to use .ico. I have no basis for judging the legitimacy of that claim and Mozilla doesn't list .ico for any browsers; so make of that what you will.
 * 1) Restrictions are browser and operating system dependent
 * 2) Always use a fallback sequence that ends with a built-in cursor type
 * 3) Internet Explorer only accepts .cur and .ani files
 * 4) *A decent reason to adhere to #2