Critical observatory
Privacy, adtech and commercial surveillance
Pixel de Tracking documents the everyday mechanisms of tracking: cookies, pixels, advertising platforms, consent dark patterns, GDPR workarounds and the commercial exploitation of personal data.
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Investigations and long-form notes to understand how data collection is built into interfaces, advertising models and the choices made by major platforms.
Google's dominance of advertising markets
The lack of regulation allowed the Californian giant to impose its rule on the web
Published by Pixel de Tracking on May 3, 2026
Advertising surveillance: the best of my tweets
Twitter is withering away and I closed my account, but I published my archives
Published by Pixel de Tracking on August 6, 2023
Decathlon, all-in on surveillance
The Mulliez family maximizes the exploitation of your personal data
Published by Pixel de Tracking on January 16, 2023
Guerlain (LVMH): luxury and surveillance
The major advertising platforms have found the ultimate weapon to identify you: your email address
Published by Pixel de Tracking on November 27, 2022
On the legality of IAB consent banners
A discussion through the example of Sirdata, an IAB CMP and behavioral data provider
Published by Pixel de Tracking on May 8, 2022
With Facebook's "resilient signals", advertising surveillance evolves
How Facebook circumvents your protections against tracking, with advertisers' complicity
Published by Pixel de Tracking on August 3, 2021
How publishers thumb their noses at the CNIL
The GDPR and ePrivacy are very good laws. But you still have to provide the means to enforce them
Published by Pixel de Tracking on June 9, 2021
Does Apple really protect you from advertising surveillance?
With iOS 14.5, tracking in iOS apps will be severely restricted. Let's look back at Apple's actions against advertising surveillance
Published by Pixel de Tracking on April 19, 2021
How Google flouts the CNIL
Google violates the "ePrivacy" Directive to surveil you without consent. Sanctioned, it still has not changed
Published by Pixel de Tracking on February 21, 2021
Facebook and WhatsApp, or the art of betraying you
Once it had acquired a dominant position, Facebook was able to impose its surveillance. History is now repeating itself with WhatsApp
Published by Pixel de Tracking on February 3, 2021