One of the problems that's plagued netizens since the inception of the world wide web that their browsers have a habit of leaking every site they've visited in the recent past. A quick stop at Blowupdolls.com, Mysecretbusinessproject.net or any other site is available to any webmaster with rudimentary coding skills.
Firefox, Internet Explorer and virtually every other browser on the planet are only too eager to cough up a user's site history, a point we lamented last month, when we discussed the crisis of security confidence felt by web surfers the world over. Mozilla, Microsoft and the rest of the gang have long refused to do anything about it because fixing the problem would make it hard for users to tell sites they've visited from those they haven't.
Of course, browsing history isn't the only way webmasters can track personal information about their visitors. We're waiting for a tool that combines history with other metrics, such as a user's IP address, geographic location, the operating system and browser model being used and the oodles of information that can be gleaned using deep-packet inspection a la Phorm and NebuAd. Then again, we wouldn't be surprised if sites are already just doing that and no one has figured it out yet. ®