gecko-dev/browser/devtools/styleeditor/test/inline-2.html

<!doctype html>
<html>
 <head>
  <title>Inline test page #2</title>
  <style type="text/css">
    .second {
     font-size:2em;
    }
  </style>
  <style type="text/css">
    .first {
     font-size:3em;
    }
  </style>
 </head>
 <body class="second">
   Inline test page #2
 </body>
</html>