<!DOCTYPE html>
<html class="reftest-wait">
<head>
<meta charset="UTF-8">
<script>
function boom()
{
document.getElementById("c").style.content = "'x'";
document.documentElement.removeAttribute("class");
}
window.addEventListener("MozReftestInvalidate", boom);
</script>
</head>
<body style="display: inline-flex;"><div></div><div style="display: table-caption;"></div><canvas id="c"></canvas></body>
</html>