@namespace url(http://www.w3.org/1999/xhtml);
@-moz-document domain(mail.google.com) {

/* Removes the adverts. */
div[class^=yxEQwb] {display: none !important;}
div[class='XoqCub V3vJRb'] {display: none !important;}
div[class='oM'] {display: none !important;}
div[class='nH u8'] {display: none !important;}
div[class='XoqCub ice3Ad'] {width: auto !important;}
.Zs {display: none !important}
}