User Style Sheets
Oooh. Love this. I get to screw with everyone's careful designs :)
O'Reilly Network: Tap the Power of Mozilla's User Style Sheets
I threw this "console" stylee style sheet together:

BODY, TD, DIV {
	background-color: #000000 !important; background-image: none !important;
}
TD, P, SPAN, DIV, FONT, B, A, h1, h2, h3, h4, h5 {
	font-family: monospace !important; color: #00cc00 !important;
}

A:link {
	text-decoration: underline !important; font-weight: bold !important;
}

img {display: none}