gecko-dev/layout/reftests/text-decoration/decoration-style-quirks.html

<p style="-moz-text-decoration-style: dotted;">
  Here is specified the decoration style as dotted but no decoration lines, however,
  <span style="font-size: 2em;
               text-decoration: underline line-through overline;">
    here has solid decoration lines</span>,
  and here has no decoration lines.
</p>
<p style="-moz-text-decoration-style: dashed;">
  Here is specified the decoration style as dashed but no decoration lines,
  however,
  <span style="font-size: 2em;
               text-decoration: underline line-through overline;
               -moz-text-decoration-style: inherit;">
    here has inherited decoration lines</span>,
  and here has no decoration lines.
</p>
<p style="text-decoration: underline line-through overline;
          -moz-text-decoration-style: dotted;">
  Here has dotted decoration lines,
  <span style="font-size: 2em;
               text-decoration: underline line-through overline;
               -moz-text-decoration-style: wavy;">
    here has wavy decoration lines</span>,
  and here has dotted decoration lines.
</p>
<p style="text-decoration: underline line-through overline;
          -moz-text-decoration-style: double;">
  Here has double decoration lines,
  <span style="font-size: 2em;
               -moz-text-decoration-style: dashed;">
    here is specified as dashed decoration lines but should be ignored</span>,
  and here has double decoration lines.
</p>
<p style="text-decoration: underline line-through overline;
          -moz-text-decoration-style: -moz-none;">
  Here is specified the decoration style as -moz-none.
</p>
<p style="-moz-text-decoration-style: dotted;
          text-decoration: underline line-through overline;">
  Here has solid decoration lines even if its style is specified as dotted
  before text-decoration.
</p>