To change the WPCargo Frontend Dashboard favicon is very simple.

Copy and paste this code to you theme functions.php file

  // Override dashboard default favicon
  function my_custom_dashboard_favicon(){
     // Favicon URL
     // Note: Make sure that it is a .ico format
     return "http://mysite.com/assets/images/favicon.ico";
  }
  add_filter( 'wpcfe_dashboard_favicon_url', 'my_custom_dashboard_favicon' );