Have you ever wondered where the websites you visit send your information? Well, if you have, read on to find out about this new extension from Mozilla that will tell you how you are tracked across websites.

Editor’s Note: Most websites use cookies of some type, and all online advertisers do, including the advertisers on this site. You’re welcome to block cookies if that’s a worry.

Installing Collusion

We will be using Collusion to automatically track and link-up related cookies, to install it head over to the Collusion website and click on the download button.

This will take you to the Collusion page in the Firefox add-ons gallery, where you can click on the add to Firefox button.

You will then have to confirm that you want to install the add-on by clicking the Install Now button.

Once installed, when you visit a website you will see a small red and white button in the right-hand corner of the add-on bar.

If you click on it, Collusion will open up and give you an overview of which websites have tracked you, and link websites using the same trackers in a spider diagram like fashion.

The sites that you have visited directly will have a blue glow surrounding them, to see where a website that you have visited has sent your data, simply hover over it. Below we can see that 9gag sent cookies to 4 third-party websites.

To get more detailed information about the websites your information was sent to, click on the website you visited, a menu will appear on the left hand side where you will be able to see the specific URL’s that information was sent to.

You should be aware that not all cookies are tracking you however, they are used for a number of things. If you wish to find out more about cookies and other tracking methods check out this post.

Profile Photo for Taylor Gibb Taylor Gibb
Taylor Gibb is a professional software developer with nearly a decade of experience. He served as Microsoft Regional Director in South Africa for two years and has received multiple Microsoft MVP (Most Valued Professional) awards. He currently works in R&D at Derivco International.
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