Linked by Howard Fosdick on Tue 6th Dec 2011 21:38 UTC
"In Mozilla's recently released 2010 annual report, the foundation indicates that 86% and 84% of royalty revenue came from one contract in 2009 and 2010, respectively. Mozilla separately confirms that Google is its largest contract." Evan Niu at Motley Fool then estimates that of Mozilla's last year royalty revenue of $121.1 million, $101.7 million came from Google. The article speculates that Google might eventually kill Firefox by withdrawing its financial support.