<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1299142">
<style>
  #id160::first-letter{
    color:blue;
  }
</style>
<div style="columns:10;">
  <div style="display:flex;"></div>
  <div style="display:grid;"></div>
  <div style="display:table;"></div>
  <math id="id160" style="display:list-item;">
    <form>
      f
    </form>
  </math>
</div>
<script>
  document.execCommand("SelectAll");
</script>
