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

.tabs-newtab-button {
-moz-box-flex: 1 !important;
-moz-box-pack: start !important;}

.tabs-newtab-button:hover,
.tabs-newtab-button:hover:active {
background-color: transparent !important;}