Use Emoticon For Your Favicon

Create new svg file favicon.svg file

<svg xmlns="" viewBox="0 0 100 100">  
<text y=".9em" font-size="90">πŸ•ΊπŸ»</text></svg>  

Place the file somewhere where you can reference it from your html file.

<link rel="shortcut icon" type="image/svg" href=""/>  

In the header of your index.html you reference the favicon.svg file and you are good to go.