"The audit revealed that more than half of the tested sites still used ad cookies after being told not to, indicating a significant disregard for user privacy preferences."
"Google's ad systems set an IDE tracking cookie in most cases, even when the browser submits a do-not-track preference, allowing for continued tracking across sites."
"Meta's tracking code does not even check whether users have opted out, leading to the continued operation of tracking cookies regardless of user preferences."
"The behavior of these companies likely violates California's rules requiring respect for recognized browser privacy preferences, exposing them to potential fines."
An independent audit found that Google, Microsoft, and Meta continue to track users' browsing habits for ad-targeting even after opt-out requests. The audit tested how these companies handle do-not-track preferences from California users visiting popular sites. More than half of the tested sites still used ad cookies after opt-out requests. Google's ad systems often set IDE tracking cookies, while Microsoft's services do so about half the time. Meta's tracking code does not check for opt-out status, leading to potential violations of California privacy laws.
Read at ExtremeTech
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