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

@-moz-document domain("mail.yahoo.com") {
#northbanner, #lrecad, #MNW, #REC, #slot_LREC, #slot_MIP4, #emptyFolderContainer, #nwPane, #swPane, #largePane, #homeTabBody {display:none !important;}
}