@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document url-prefix(http://twilog.org)
{

ins,
a[href^="http://twilog.org/ad"],
a[href^="http://px.a8.net/"],
a[href*="amazon"][href*="-22"],
#ad-upper,
#ad-bottom
{
display:none !important;
}

}