@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("facebook.com"){
.fbFeedTicker {
  display: none !important;
}

.sidebarMode.ticker 
.fbChatSidebar 
#pagelet_ticker {
  height: 0% !important;
  display: none !important;
}

.sidebarMode.ticker 
.fbChatSidebar 
.fbSidebarGripper {
  height: 0% !important;
  display: none !important;
}

}