Change the favicon on the browser tab when viewing the admin area
// Change favicon for dashboard area
function admin_favicon() {
\!h echo '<link rel="Shortcut Icon" type="image/x-icon" href="https://media.digitalrefreshmkt.com/file/h_144/DigitalRefresh-Favicon.png" />';
} //Change logo URL, 512x512px
add_action('admin_head', 'admin_favicon');