Apple Touch Icon

Recently I’ve been using Safari on the new Mac OS and there’s a sort-of-neat feature where clicking on the URL bar opens some big icons that you can click on to go to your “favorite” web sites:

As you can see, Hitmanforum has a default Discourse icon. This is controlled with this line in the head of the web code:

<link rel="apple-touch-icon" type="image/png" href="/images/default-apple-touch-icon.png">

Can we change that to the Hitman insignia (or something even more fun)? It’s called the “touch icon” so I assume there’s additional implications for iOS devices but I don’t know what they are.

I thought it was already changed before? Wasn’t there a topic about this?

I believe the “favicon” was changed (the tiny image to the left of the URL) but this is something else.