It seems like in just about every department, Mozilla does things right. As a case in point, I was gratified to read, Window Snyder. Window's first name notwithstanding, she makes it clear that Mozilla groks security:
At a lot of companies, there's fear around security: you don't want to talk about what you're doing around security because one might deem it not enough--or might want to criticize it...We benefit from being open; it's the model for us and it's been successful for us.
It's an interesting article, one I encourage you to read. It's just one more reason to choose Mozilla and its open-source products like Firefox.