Google says it will resume its SameSite cookie update starting July 14, alongside the launch of Chrome 84; the update was rolled back in April due to COVID-19
Aliya Chaudhry / The Verge :
Context & Ripple Effects
In early April, Google temporarily paused enforcement of its SameSite cookie policy in Chrome so that essential-service websites scrambling under COVID-19 wouldn't break mid-crisis if their third-party cookies lacked proper labels. Today it set a firm restart date: enforcement resumes July 14 alongside the Chrome 84 launch.
The move matters because SameSite is the first domino in Chrome's longer cookie crackdown — the same program whose full third-party-cookie phaseout was later pushed from 2022 to late 2023, then again when Google deferred the deadline to H2 2024 citing more Privacy Sandbox testing.
First-order effects
- From July 14, websites and ad-tech providers whose third-party cookies aren't tagged with correct SameSite attributes see those cookies blocked in Chrome 84 — login flows, embedded payments, and ad targeting break until they fix their labeling.
- Essential-service sites lose the temporary grace period they were granted in April's rollback and must meet the same standard as everyone else.
Second-order effects
- Advertisers and publishers get a forced rehearsal for a cookie-constrained Chrome: the compliance work SameSite demands (auditing every third-party cookie dependency) is the same inventory exercise they'll need once the full phaseout arrives, so vendors who fixed labeling first gain a head start.
- Rival browsers and ad platforms watch how much breakage the enforcement causes, which feeds directly into the pacing debate over Google's later cookie-blocking deadlines.
Third-order effects
- If the pattern holds — a hard date announced, softened, resumed — browser-enforced privacy deadlines become moving targets that shift whenever ecosystem readiness lags, pressuring Google to invest more in replacement technologies like Privacy Sandbox rather than pure removal.
- Web infrastructure consolidates around whoever controls the enforcement calendar: Chrome's cadence effectively sets the migration schedule for the entire advertising and authentication stack built on third-party cookies.
The trend: Chrome is ratcheting up restrictions on third-party cookies step by step — SameSite enforcement now, full blocking later — but each deadline bends to ecosystem readiness, stretching the transition across years.