The WebFX Tab Pane is a great javascript method of adding tabs to webpages. However I found that twhen using the Luna style the f;onts on Linux/Firefox defaulted to a Times type that was also a little too big. To fix this amend the tab.css file in the Lunafolde and change all occurences of
font: 11px Tahoma;
with:
font-size: 11px;
font-family: Tahoma, Arial, Helvetica, sans-serif;