Fixed-font white-on-black user style

fixed.css

/* AGENT_SHEET */
@-moz-document url-prefix(http://), url-prefix(https://), url-prefix(file://),
               url-prefix(about:sessionrestore), url-prefix(about:newtab)
{
	* {
		color: #C0C0C0 !important; /*white !important;*/
		background: black !important;
		font-family: Fixed, monospace !important;
		font-size: 18px !important; /* force everything to use the same size */
  	/*font-size: 14px !important;  force everything to use the same size */
  	letter-spacing: 0px !important;
		text-shadow: none !important;
		line-height: 1.5em ;
	}
	
	body {
		font-size: 18px !important;
	}

	a:link { color: #A0A0FF !important; }
	a:link * { color: inherit !important; }
	a:visited { color: #00DD00 !important; }
  a:visited * { color: #00DD00 !important; }

	
	tt, code, pre {
		font-family: monospace !important;
		font-size: 0.8em !important;
	}
	
	/*img {
		background: white !important;
	}*/
		
}

@-moz-document url-prefix(https://www.youtube.com/) {
	div { background: transparent !important; }
}