@-moz-document url-prefix('chrome://') {

/* == autohide the stars == */

#extbook-main-box .extbook-icon,
#extbook-main-box #extbook-addstar {visibility: collapse !important;}

#star-button {display: none !important;}

/* == recover by hovering == */

#urlbar:hover .extbook-icon {visibility: visible !important;}

#urlbar:hover #star-button {display: -moz-box !important;}

}