As far as I'm concerned, that is an actually useless functionality of IE. Mozilla Firefox emphasizes usability, security and accesibility. Hence, it doesn't make use of such things.
I liked the random inclusion of the phrase "on this, the day of my daughter's wedding". :P I thought the IE and FF logos were a bit hard to make out, though...
This reminds me of another pet peeve I have with my system. In OS 9, IE had a function that let you change the color scheme of the browser (ie, button bar, scroll bar, loading bars) [hey, I made a pun!], and in OS X, there is no other colored theme besides Aqua, and Safari won't let you change the colors like IE. It should be able to read the CSS too.
This reminds me of another pet peeve I have with my system. In OS 9, IE had a function that let you change the color scheme of the browser (ie, button bar, scroll bar, loading bars) [hey, I made a pun!], and in OS X, there is no other colored theme besides Aqua, and Safari won't let you change the colors like IE. It should be able to read the CSS too.
my guess would be that that died out when the choice of color died out in macs.
now, if you had that choice on an ipod mini, i would not be surprised.