XUL panels in a Firefox extension overlay always come with a shadow for free. How can I remove this shadow?
Example code for the shadow effect I don't want:
<popupset>
<panel id="popuppanel" width="500" noautohide="true">
<vbox>
<label value="test"/>
<label value=""/>
<label value=""/>
<label value=""/>
</vbox>
</panel>
</popupset>
And a screenshot:
Example image of shadow effect I don't want. http://img124.imageshack.us/img124/7766/shadowj.png