Intensive use of cookies raises privacy concerns, especially regarding third-party cookies. These tracking cookies are under significant regulatory scrutiny due to issues linked to user confidentiality:
- They collect detailed data on users' online behavior, allowing the creation of comprehensive digital profiles.
- This information can be shared with third parties without explicit user consent.
- There is growing user concern over the lack of transparency about the scope and use of data collection.
Consent modules often discourage or make it difficult to refuse third-party cookies through opaque designs (e.g., refusal options hidden, requiring deselecting hundreds of partners one-by-one, or blocking access without full acceptance).
Furthermore, the effectiveness of tracking cookies is also challenged:
- Despite measures to reduce refusals, cookies are frequently blocked or deleted by browsers, with rejection rates up to 64% on desktop and 75% on mobile.
- Cookies struggle to track users across multiple devices and apps, leading to inaccurate data and potential ad budget waste.
Google plays a major role in the move toward a cookieless web. With Chrome holding over 60% market share, its decisions strongly influence digital practices.
In 2020, Google launched its "Privacy Sandbox" initiative to replace third-party cookies with more privacy-respecting technologies. One solution, the Google Topics API, assigns interest-based themes to users (e.g., "live performance," "cinema") without identifying individuals. Advertisers can target these themes instead of specific profiles.
However, this transition away from third-party cookies remains slow, even for Google. The company has postponed the removal of third-party cookies on Chrome twice already due to balancing industry feedback, regulatory concerns, and developer challenges. Originally planned for 2024, the removal was delayed to early 2025 and is being implemented very gradually.