Cherry Seed

Are third-party cookies really dead?

third party cookies dead cookie deprecation chrome third party cookies browser cookie blocking

Quick Answer

Not completely, but they are dying. Safari and Firefox already block them by default. Google Chrome shifted to a user-choice model instead of a full phase-out. The broader trend is clear: third-party cookies are losing effectiveness as users block or reject them, and privacy regulations continue tightening.

Full Answer

Yes. The debate is over. Safari and Firefox have blocked third-party cookies by default since 2020. Chrome is implementing Privacy Sandbox as a replacement. The cross-site tracking that powered digital advertising for 20 years is ending. Current Browser Status Safari (20%+ market share):

  • Third-party cookies: Fully blocked since 2020
  • First-party cookies: 7-day cap (24-hour cap from tracking domains)
  • Status: Most restrictive browser Firefox (3-4% market share):
  • Third-party cookies: Blocked via Enhanced Tracking Protection
  • Strict mode: Blocks nearly all cross-site tracking
  • Status: Privacy-first approach Chrome (60%+ market share):
  • Third-party cookies: Being replaced by Privacy Sandbox
  • Topics API: Interest-based targeting without cookies
  • Attribution Reporting API: Privacy-preserving conversion tracking
  • Status: Transitioning away from cookies What Dies with Third-Party Cookies Cross-site tracking: No more following users from site to site Behavioral retargeting: Can't identify "cart abandoners" across the web View-through attribution: Can't track who...

Sources

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Cite This Answer

Cherry Tree by Seresa - https://seresa.io/seed/cookie-crisis/third-party-cookies-dead