html icon in browser tab code example
Example 1: add tab icon html
<link rel="icon" href="http://example.com/favicon.png">
Example 2: html tab icon
<link rel="icon" type="image/png" href="img/icon.png">
Example 3: how to change tab icon in html
<link rel="shortcut icon" href="http://sstatic.net/stackoverflow/img/favicon.ico">