@-moz-document domain(netvibes.com) {
#addContentLink, #ecosystem-link {
background-image: url(http://static.netvibes.com/themes/custom/img/top/addcontent/white.png) !important;
}

#addContentLink span, #ecosystem-link span {
background-image: url(http://static.netvibes.com/themes/custom/img/top/addcontent/white.png) !important;
}
}