Lifehacker covers some of the new features of the upcoming Firefox 2.0. The fact that it will support google suggest and integrate with bloglines seem useful to me personally. A more interesting feature though is this anti-phishing/forgery one (pictured).
It seems to track phishing sites based on some central database, and people can “rate” a site as a forgery or not (I’m guessing by the “This isn’t a web forgery” link). I imagine it isn’t purely a human-generated list of sites, but I think the trend towards democratic, “wisdom of crowds“-type features is going to increase in browsers. Right now there are some Firefox plugins that fall into this category (stumbleupon comes to mind).
A lot of the web-2.0 apps these days rely on some democratic way for users to affect the experiences of the community. For example, if enough people digg a story it makes it to the front page, where it’s viewed by more people. It’s also common for even older sites like craigslist to offer features like “report this post as offensive” and rely on their user base to filter out content that might be inappropriate for other users.