<html>
    <head>
        <style>
            @font-face {
                font-family: customFont;
                src: url(Ahem.ttf);
            }
        </style>
    </head>
    <body contenteditable style="font-family: customFont; font-size: 48px;">Lorem Ipsum
        <script>
            document.body.focus();
        </script>
    </body>
</html>