mozilla-release/layout/reftests/text/1331339-script-extensions-shaping-1-ref.html

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<style>
@font-face {
  font-family: test;
  src: url(../fonts/TAMLThiruValluvar-Regular.ttf);
}
.test {
  font-family: test;
  width: -moz-fit-content;
}
.mask {
  background: green;
  position: relative;
  top: -.7em;
  height: .7em;
}
</style>
</head>
<body>
<div class="test">
&#x0BA4;&#x0BC6;&#x0BAA;&#x0BC6;
<div class="mask"></div>
</div>
</body>
</html>