<!DOCTYPE html>
<html>
<head>
<style>
input {
-moz-appearance: none;
margin: 0;
padding: 10px;
font-size: 20px;
height: 100px;
width: 100px;
border: 1px solid red;
}
</style>
</head>
<body onload="document.getElementById('i').focus()">
<input type="text" id="i">
</body>
</html>