favicon fa code example

Example 1: favicon HTML

<link rel="icon" href="yourIcon.png" type="image/png">

Example 2: favicon in html

<link rel="icon" href="image.jpg" type="image/jpg">

Example 3: fa icons

<script src='https://kit.fontawesome.com/a076d05399.js'></script>

Example 4: font awesome fa

Posting random icons in grepper doesn't make sense guys, you need the 
visuals on the page