<!DOCTYPE html>
<html lang="en-US">
<head>
  <title>-moz-border-outset-width: 1em</title>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <meta http-equiv="Content-Style-Type" content="text/css">
  <style type="text/css">
  div {
    margin: 2em;
    border-width: 1em;
    border-style: solid;
    border-image: 1 1 1 1 / / 1em url('3x3green-1DD813.png');
  }
  </style>
</head>
<body>
<div>
border.png<br />second longer longer longer longer longer longer line<br />third longer longer longer longer longer longer line
</div>
</body>
</html>