Дизайнер
<link rel="apple-touch-icon" sizes="57x57" href="/images/favicons/apple-touch-icon-57x57.png" /> <link rel="apple-touch-icon" sizes="60x60" href="/images/favicons/apple-touch-icon-60x60.png" /> <link rel="apple-touch-icon" sizes="72x72" href="/images/favicons/apple-touch-icon-72x72.png" /> <link rel="apple-touch-icon" sizes="76x76" href="/images/favicons/apple-touch-icon-76x76.png" /> <link rel="apple-touch-icon" sizes="114x114" href="/images/favicons/apple-touch-icon-114x114.png" /> <link rel="apple-touch-icon" sizes="120x120" href="/images/favicons/apple-touch-icon-120x120.png" /> <link rel="apple-touch-icon" sizes="144x144" href="/images/favicons/apple-touch-icon-144x144.png" /> <link rel="apple-touch-icon" sizes="152x152" href="/images/favicons/apple-touch-icon-152x152.png" /> <link rel="apple-touch-icon" sizes="180x180" href="/images/favicons/apple-touch-icon-180x180.png" /> <link rel="icon" type="image/png" href="/images/favicons/favicon-32x32.png" sizes="32x32" /> <link rel="icon" type="image/png" href="/images/favicons/favicon-96x96.png" sizes="96x96" /> <link rel="icon" type="image/png" href="/images/favicons/favicon-16x16.png" sizes="16x16" /> <meta name="msapplication-TileColor" content="#222222" /> <meta name="msapplication-TileImage" content="/images/favicons/mstile-144x144.png" /> <meta name="theme-color" content="#222222" /> <link rel="icon" href="/images/favicons/favicon.ico" type="image/x-icon" /> <link rel="shortcut icon" href="/images/favicons/favicon.ico" type="image/x-icon" />
Это и обычные Favicon, и для добавления на рабочий стол iOS, и для плитки в новых Windows.
Советую почитать css-tricks.com/favicon-quiz на эту тему и комментарии там же.
Хотя по лидерству хрома и фаерфокса статистика совпадает. Может не так уж и отличаются?