Chrome/Firefox/Safari/IE: Whenever you visit a website, data about your visit is likely sent to advertisers, social networks and other companies. Free browser add-on Do Not Track Plus not only tells you what data is being collected, it also blocks those attempts to share your information.
Although "Do Not Track" browser options are available, recently we've seen even more need for add-ons like Do Not Track Plus. Google and other advertising companies have apparently been bypassing the privacy settings of Safari users and Internet Explorer users, tracking them when they don't want to be tracked.
Do Not Track Plus, once installed, tells you when a website tries to send data to other companies and then blocks it. Social media buttons (Facebook like, Google +1, Twitter) still work when you click them, but when you don't click on them, they're not tracking you. You can allow Google +1s on a permission basis.
Do Not Track Plus isn't an ad blocker, so you'll still see ads. But by installing Do Not Track Plus, you block third-party sites from putting cookies on your machine and seeing that you've visited a website. Clicking on the extension shows you more detail about each category of tracking company (there are hundreds) and how Do Not Track handles them.