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Firefox Added Do Not Track (DNT ) in Latest Firefox Release

There is a piece of good news from Mozilla team about adding DNT (Do Not track) feature in Firefox 4 beta 11 version. This post is a continuation from one of my previous post anticipating the introduction of a Firefox feature which prevents websites from Tracking User Activities. At that time it was not sure whether Firefox may implement it or not but they have added it in the latest release. It will prevent websites and other third-party ad servers from picking browsing activities if the user enabled Do Not Track in his browser. Now let us check how this feature works.

How Do Not Track works in Firefox

The basic implementation of Do Not Track is explained below.

Step 1: User Enables DNT

Step 2: Firefox sent DNT to Websites and Ads server

Step 3: Websites respond by providing content without tracking user behavior.

Step 4: Ads server serves non-personalized ads without tracking user behavior.

It may be not so happy news for advertisement companies and publishes because DNT will force them to show unrelated ads on a web page. For example, if an online advertisement server cannot scan the interests of a particular user, he will see a standard ads unit which may not be in his interests. This will reduce the CTR (Click Through Rate) and the earning of the publisher and Advertisement company.

Technical Difficulty with Implementing Do Not Track feature

The major difficulty in implementing DNT is whether third-party websites and ads servers respect this signal or not. Right now there is no way to forcefully stop third party servers from gathering user activities. However, I really appreciate this feature though there is no cent percent guarantee of the result. I encourage you to start using it. If you want to download Firefox beta version, go to the link below.

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Unknown said…
DNT header is by far the best proposal for opt-out of behavioral advertising.

If you want to check if a website or your browser implements DNT, enter it at

The site will scan for embedded tracking sites in the html and also test if it responds to the dnt header.

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Alex George
Alex George has Engineering graduation in Computer Science and an MBA in Finance. He had been working as a senior Network Engineer for ten years. His specialization is in Cisco products. Traveling is one of his hobbies and visited various places as part of his onsite work. He visited different places as part of his onsite work like New York, Dubai, London, etc. Right now Alex is a director of one of the leading career development firms in India, which trains students for UPSC, SSC, and PSC examinations. He guides a lot of students to get selection for various prestigious institutions like CBI, Income Tax Department, etc. Alex George is a stock market investor and a very active intraday trader. Engineering Background: He has a B.Tech in Computer Science and Engineering and passed different network and security courses like CCNA, CCNP (Security), CEH, and various Microsoft certifications. Finance Background: Alex has an MBA in Finance. He is an active intraday trader and a Share Market Investor. Webmaster Skills: Alex is a blogger since 2004. He has a working knowledge of HTML, CSS, PHP, and JavaScrip.