In a move likely to make a lot of people happy, future development of Firefox will have areas focused on stopping and fighting phishing, in an effort to protect people not only from malicious software, but maliciously crafted sites and lures that go beyond the normal functionality of a web browser. Google is set to help Mozilla in this endeavor:

"Everybody understands that phishing is a significant problem on the Web," said Shaver, a technology strategist at the company, which oversees Firefox development. "We are putting antiphishing into Firefox, and Google is working with us on that."
Firefox 2 will be the first version that will have this functionality, and will incorporate things like blacklists, site analysis, address analysis, and more. How exactly it will work will be very interesting, and the effectiveness may be a huge advantage that FF 2 can wield over IE7.