text size on firefox

[HJC]

hi all, the following css work on IE , but not firefox, how to fix it?
ul.disc {list-style-type: disc;
font-size: 12px;
color: black;
font-family: Verdana;

}
<ul class="disc">
<li>abc</li>
</ul>

[Centauri]

Nothing wrong with that - text size should be the same in each browser. Maybe a conficting style elswhere on the page?