1. Upload your icon to the “files” section of your account and copy the https:// version. This way you won’t get a security warning at checkout. note: IE pretty much only accepts .ico and .jpg so if you are trying to tailor to the 12.1% market then you will want one of those extensions.
2. Then on each of your checkout pages you would put the following in the “HTML Head Section” note: I am using single page checkout, but all checkout pages need the code for it to show up on all pages of checkout
<link rel="icon" href="https://lib.store.yahoo.net/lib/youraccountnumber/icon.ico" type="image/x-icon" />
<link rel="shortcut icon" href="https://lib.store.yahoo.net/lib/youraccountnumber/icon.ico" type="image/x-icon" />
You could also paste the two lines of code above into your “Head-tags” global variable in the store editor to have a favicon on call pages. Good Luck 🙂