add icon to website tab
snippet in html

add icon website

user5077

<link rel="icon" href="http://example.com/favicon.png">

add icon to website tab

user3035

Convert your image to .ico (use https://hnet.com/png-to-ico/)

Rename your ico to favicon

add this to the <head>: <link rel="shortcut icon" type="image/x-icon" href="favicon.ico" />