- Go to Safari Preferences.
- Choose the Advanced view.
- Check Show Develop menu in menu bar. A Develop option appears instantly on the Menu Bar.
- Choose 'Send Do Not Track HTTP Header'.
- Go back to Preferences and uncheck "Show Develop menu in menu bar.
There is a free Safari Extension available called Do Not Track Plus that shows you who and how you are being tracked on a web page. You can learn more about it here. It adds a button to the Safari Tool Bar that shows a number that indicates how many entities are tracking you on that page. Click the button to get more detailed info about who is tracking you and how to block them.
To give you an idea of how ineffective the Do Not Track request is, I visited CNN.com with Do Not Track turned off. The Do Not Track Plus Extension showed 9 entities tracking me. With Do Not Track turned on, the Do Not Track Plus Extension still showed I was being tracked by 7 entities.
DISCLOSURE: Basics4Mac uses one tracking mechanism called Add This that only tracks usage of the Share buttons for Twitter and Facebook.
So can you actually stop entities from tracking your browsing? There are several websites and tools that will act as a middleman to keep your identity anonymous. You can find several using this Google Search. Most of the services I looked at that are "free" are stripped down versions of a premium service they are trying to sell. Also, who's to say that these middlemen are't tracking your info even if they say they aren't? If you have any experience with an anonymous browsing service, please let me know your experience in the Comments.