Just learned that this person owns DNA Lounge (and pizza?), and is a founder (early contributor?) of Netscape and Mozilla.org. I've lived and worked in that particular area of SF for years and haven't known this.
One of my company's clients has a beautiful office right above DNA Lounge (well, across the street or just adjacent - it's been a while and I've only been there once). They told me they can hear sound checks from their rooftop patio.
about:robots is from the early Firefox releases. Pretty sure it is from Firefox 3.0 development as you can find the same robot in images when searching for Firefox Gran Paridiso Robot.