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Test Info:

<!DOCTYPE HTML>↩
<html>↩
<body>↩
<canvas moz-opaque id="c" width="500" height="500"></canvas>↩
<script>↩
var ctx = c.getContext('2d');↩
ctx.fillStyle = "white";↩
ctx.fillRect(0, 0, 500, 500);↩
ctx.fillStyle = "black";↩
ctx.font = "50px sans-serif";↩
ctx.fillText("Hello", 200, 200);↩
</script>↩
</body>↩
</html>↩