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

.l6 { 
     position:absolute; 
     top:38px !important;;
     right:20px !important;;
     width: 240px !important;
     color: black !important;
     text-align: right !important;
     padding-right: 10px !important;  
     background: rgba(255, 255, 255, 0.5)  !important;
     z-index: 1000 !important;
     -moz-border-radius: 5px !important;
     border: #566068 1px solid !important;
    }

}