Firefox About:Blank Glass

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

/*Removes Background-Color From Chrome*/
#appcontent,
#appcontent > #content,
#appcontent > #content > tabbox > tabpanels {
  background-color: transparent !important;
}

/*Fixes Aero Border*/
#main-window[stylish-url="about:blank"]:not([onclose^="PrintUtils"]):not([title^="Source Chart"]):not([chromehidden="menubar toolbar directories extrachrome "]) #appcontent {
  -moz-appearance: none !important;
}

/*For Transparency In Fullscreen*/
#main-window[inFullscreen="true"]{
  -moz-appearance: -moz-win-borderless-glass !important;
  background: none !important;
}

/*Sets Content Transparent*/
#main-window[stylish-url="about:blank"]:not([onclose^="PrintUtils"]):not([title^="Source Chart"]):not([chromehidden="menubar toolbar directories extrachrome "]) #content browser:not([src]){
   opacity: 0 !important;
}