@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

#browser-bottombox {
 margin-top:-10px;
 padding-top: 10px;
}

#addon-bar {
 margin-bottom: -21px;
 -moz-transition: margin-bottom .3s 1s ease-out;
}

#browser-bottombox:hover #addon-bar {
 margin-bottom: 0;
 -moz-transition: margin-bottom .25s .4s ease-in;
}