Minimal test case for mininal font problem

minfont_test.html

<canvas id="c1"></canvas><br>
<script>
  var c1 = document.getElementById("c1");
  var ctx = c1.getContext("2d");
  ctx.font = "12px serif";
  ctx.fillText("test", 10, 25);
</script>

<canvas id="c2"></canvas><br>
<script>
  var c2 = document.getElementById("c2");
  var ctx = c2.getContext("2d");
  ctx.font = "2px serif";
  ctx.scale(6,6);
  ctx.fillText("test", 10/6, 25/6);
</script>

<canvas id="c3"></canvas><br>
<script>
  var c3 = document.getElementById("c3");
  var ctx = c3.getContext("2d");
  ctx.font = "0.2px serif";
  ctx.scale(60,60);
  ctx.fillText("test", 10/60, 25/60);
</script>

https://bugzilla.mozilla.org/show_bug.cgi?id=726227