<!DOCTYPE html>
<meta charset="UTF-8">
<title>Testcase, Mozilla bug 1468654</title>
<style>
span {
  display: block;
  position: relative;
}

span:before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 1px solid black;
  margin-left: 5px;
  margin-top: 5px;
  margin-right: 12px;
  vertical-align: top;
}

body {
  line-height: 1.6;
}

.column {
  float: left;
  width: 13em;
  margin-right: 1em;
}

</style>

<div class="column">
<div><span>One</span></div>
<div><span>Two</span></div>
<div><span>Three</span></div>
<div><span>Four</span></div>
<div><span>Five</span></div>
<div><span>Six</span></div>
<div><span>Seven</span></div>
</div>
<div class="column">
<div><span>Eight</span></div>
<div><span>Nine</span></div>
<div><span>Ten</span></div>
<div><span>Eleven</span></div>
<div><span>Twelve</span></div>
<div><span>Thirteen</span></div>
<div><span>Fourteen</span></div>
</div>
<div class="column">
<div><span>Fifteen</span></div>
<div><span>Sixteen</span></div>
<div><span>Seventeen</span></div>
<div><span>Eighteen</span></div>
<div><span>Nineteen</span></div>
<div><span>Twenty</span></div>
<div><span>Twentyone</span></div>
</div>