Mozilla/SeaMonkey do not attempt to grab the /favicon.ico by default, because that behaviour leads to 404's in the webserver-logs for sites without that icon. That can be overridden by setting "browser.chrome.favicons" to true, but it'd be easier and cleaner if you'd just link the icon in your html code as it's supposed to be done:
I like this site name cause it's easy to remember.
OK, but I've never played Quake (am I the only one? just asking), so I much prefer the ones that say "SDA" because the Quake guy has no meaning to me. It's true that SDA used to be about Quake, but it's not at all part of the main site now, so it doesn't seem to fit. But whatever. I'm using Mozilla and can't find about:config, so it doesn't really matter to me.
You type it into the address bar (instead of speeddemosarchive.com or whatever). The other useful one is about:plugins, about: is blah, and about:mozilla is an easter egg that is kinda neat once.