does a favicon have to be png code example
Example 1: png favicon
<link rel="icon" type="image/png" href="logo.png" />
Example 2: favicon png
<link rel="icon" type="image/png" href="https://cdn.yourwebsite.com/favicon-16x16.png" sizes="16x16">
<link rel="icon" type="image/png" href="https://cdn.yourwebsite.com/favicon-32x32.png" sizes="32x32">
<link rel="icon" type="image/png" href="https://cdn.yourwebsite.com/favicon-96x96.png" sizes="96x96">