$66.8 Million isn't in the neighborhood of $100 million. Yes, they're both huge sums of money, but not close enough to go "meh, close enough." Thanks for the link though - I'm somewhat surprised Mozilla made as much money from a non-Google source as they did.
That $67 million dollar figure was from 2006, and that was up 26% from 2005. I can only assume 2 more years of continued growth and more market share have brought that number up substantially.