Debian Etch will include a browser called “IceWeasel,” which is simply Firefox rebranded with open source artwork, whereas Ubuntu Feisty will include a browser called “Firefox” which is a little bit pregnant.
— Mark Pilgrim again. “A little bit pregnant” here is code for “a little bit non-free”. (Apparently Firefox isn’t free software because it contains non-free artwork; you can distribute it without the non-free artwork, but then you’re not allowed to call it Firefox. That’s what Debian is doing.)