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

toolbarbutton.bookmark-item:hover {
      color:blue !important;
      /*background-color: cyan !important;*/  
}

/*You can customize all the text style*/

/***************************
toolbarbutton.bookmark-item{
     font-size:9pt !important;
     font-family:tahoma !important;
     font-weight:bold !important;
}
*****************************/