Hacking Firefox: The secrets of about:config
Another collection of great Firefox configuration tips, with quite a few that I didn't even know about.
Which ISPs Are Spying on You?
The results of a survey that Wired.com did with the major ISP's in this country on matters such as data retention, the distribution of customer browsing information (oh, you know they sell that stuff, it's marketing gold...), and privacy. Don't expect much—the results are pretty much what you'd expect.
It's stuff like this that has made me start using things like the TrackMeNot extension and 2048-bit PGP security (it's not as impressive as it sounds).