https://takao.blog/en/tags/privacy/Recent content in Privacy on Commentary of TakaoHugo -- gohugo.ioenCommentary of TakaoSat, 13 Jun 2026 23:11:50 +0900https://takao.blog/en/web/cloudflare-privacy-sandbox-thirdparty-cookie-deprecation/Fri, 05 Dec 2025 00:00:00 +0900https://takao.blog/en/web/cloudflare-privacy-sandbox-thirdparty-cookie-deprecation/<img src="https://takao.blog/img/thumnail.webp" alt="Featured image of post Third-Party Cookie Deprecation and Web Privacy APIs" /><h2 id="the-end-of-third-party-cookies">The End of Third-Party Cookies </h2><p>The third-party cookie era is ending. After years of delays and industry pushback, Chrome has begun phasing out cross-site tracking cookies. This fundamentally changes how web analytics, advertising, and personalization function. Understanding the deprecation timeline and replacement APIs is essential for every web developer.</p> <h2 id="chrome-phase-out-timeline">Chrome Phase-Out Timeline </h2><p>Google&rsquo;s Privacy Sandbox initiative has followed this trajectory:</p> <table> <thead> <tr> <th>Date</th> <th>Milestone</th> </tr> </thead> <tbody> <tr> <td>2024 Q1</td> <td>1% Chrome users have 3PC restricted</td> </tr> <tr> <td>2025 Q2</td> <td>Testing phase with expanded cohorts</td> </tr> <tr> <td>2025 Q3-Q4</td> <td>Graduated rollout begins</td> </tr> <tr> <td>2026</td> <td>Full deprecation for all Chrome users</td> </tr> </tbody> </table> <h2 id="privacy-sandbox-apis">Privacy Sandbox APIs </h2><p>The Privacy Sandbox replaces third-party cookies with several purpose-built APIs:</p>