<!DOCTYPE html>
<html class="reftest-wait">
  <head>
    <style>
      label {color: red}
      img[src*="solidblue"]:not(:-moz-broken) + label {color: green}
      img { display: none; }
    </style>
  </head>
  <body onload='var i1 = document.getElementById("ffximage");
                i1.onload =
                  function() { document.documentElement.className = ""; };
                i1.setAttribute("src", "solidblue.png");'>
    <img src="solidblue.png">
    <img src="no-such-scheme:nothing" id="ffximage"/>
    <label for="ffximage">Text should be green</label>
  </body>
</html>