Значок вкладок HTML
<link rel="icon" type="image/png" href="img/icon.png">
Shy Snail
<link rel="icon" type="image/png" href="img/icon.png">
<link rel="icon" type="image/png" href="/favicon.png"/>
<link rel="shortcut icon" type="image/png" href="http://example.com/favicon.png"/>
<link rel="icon" href="http://example.com/favicon.png">
<link rel="shortcut icon" href="http://sstatic.net/stackoverflow/img/favicon.ico">