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

@-moz-document domain("mail.google.com") {

.mn, .mp, .ma {display: none !important;}

/* You are currently using */
.mj {
color: #DDD !important;
position: absolute !important;
right: 15px !important;
bottom: 10px !important;
font-weight: normal !important;
text-shadow: #272D30 0 1px !important;}

/* Last account activity: */
.l6 {
color: #272D30 !important;
position: absolute !important;
right: 15px !important;
bottom: -6px !important;
font-size: 9px !important;}
}