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

tab[image*="firefoxfacts.com"] .tab-icon,
.bookmark-item[image*="http://www.firefoxfacts.com/"]:not([container]) .menu-iconic-icon,
.bookmark-item[image*="http://www.firefoxfacts.com/"]:not([container]) .toolbarbutton-icon,
#page-proxy-favicon[src*="firefoxfacts.com"] {
  width: 0 !important;
  padding-left: 16px !important;
  background: transparent url("data:image/gif;base64,R0lGODdhEAAQALMAAAQCBGSaZMyazGRmnJzOzMzOnJyaZJxmZPz+/GSanJxmnMzOzAAAAAAAAAAAAAAAACwAAAAAEAAQAAAEQRDISaWpAOE8MEIEtSBXpXzF9HUeCgTfJn2aEMvASRQIi2c3WSFB08gMiEPRV4EVEQrcExH4AYPSoTVDCCgOW1wEADs=")
  center center no-repeat !important;
}