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Third-party cookie dependency grace period | Privacy Sandbox | Google for Developers
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href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/related-website-sets?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/related-website-sets" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/related-website-sets"><span class="devsite-nav-text" tooltip>Related Website Sets</span></a></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/related-website-sets-integration?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/related-website-sets-integration" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/related-website-sets-integration"><span class="devsite-nav-text" tooltip>Related Website Sets Developer guide</span></a></li> <li class="devsite-nav-item devsite-nav-expandable"> <div class="devsite-expandable-nav"><a class="devsite-nav-toggle" aria-hidden="true"></a> <div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"><span class="devsite-nav-text" tooltip>Federated Credential Management API</span> </div> <ul class="devsite-nav-section"> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/fedcm?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/fedcm" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/fedcm"><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/fedcm-developer-guide?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/fedcm-developer-guide" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/fedcm-developer-guide"><span class="devsite-nav-text" tooltip>Developer guide</span></a></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/fedcm-updates?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/fedcm-updates" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/fedcm-updates"><span class="devsite-nav-text" tooltip>Updates</span></a></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/learn?api=federatedcredentialmanagement&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/learn?api=federatedcredentialmanagement" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/learn?api=federatedcredentialmanagement"><span class="devsite-nav-text" tooltip>Tagged docs and blog posts</span></a></li> </ul> </div></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/storage-partitioning?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/storage-partitioning" track-type="bookNav" track-name="click" 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class="devsite-nav-title devsite-nav-title-no-path"><span class="devsite-nav-text" tooltip>Temporary exceptions</span> </div></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/temporary-exceptions/preserving-critical-user-experiences?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/temporary-exceptions/preserving-critical-user-experiences" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/temporary-exceptions/preserving-critical-user-experiences"><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/temporary-exceptions/grace-period?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" 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href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/dashboard?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/dashboard" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/dashboard"><span class="devsite-nav-text" tooltip>Compatibility lookup tool</span></a></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/temporary-exceptions/storage-partitioning-deprecation-trial?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/temporary-exceptions/storage-partitioning-deprecation-trial" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/temporary-exceptions/storage-partitioning-deprecation-trial"><span class="devsite-nav-text" tooltip>Storage Partitioning deprecation trial</span></a></li> <li class="devsite-nav-item"><a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/temporary-exceptions/heuristics-based-exceptions?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /privacy-sandbox/cookies/temporary-exceptions/heuristics-based-exceptions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/privacy-sandbox/cookies/temporary-exceptions/heuristics-based-exceptions"><span class="devsite-nav-text" tooltip>Heuristics based exceptions</span></a></li> <li class="devsite-nav-item"><a 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<devsite-view-release-notes></devsite-view-release-notes> </div><devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded> </devsite-toc> <devsite-recommendations-dropdown class="nocontent"></devsite-recommendations-dropdown> <div class="devsite-article-body clearfix "> <p>Chrome's third-party cookie grace period provides a way for sites and services experiencing breakage to request additional time to move away from third-party cookies to alternative solutions. Eligible grace period participants will be granted continued access to third-party cookies for a limited time. Chrome plans to maintain the grace period at least until we introduce a new experience in Chrome that lets people make an informed choice about third-party cookies that applies across their web browsing.</p> <p>To apply for access to the grace period, you must report features that will be broken by third-party cookie changes at <a href="https://translate.google.com/website?sl=auto&tl=en&hl=auto&u=https://goo.gle/report-3pc-broken">goo.gle/report-3pc-broken</a>. Breakage can be reported by a third-party, first-party (or a user).</p> <aside class="note"> <strong>Note:</strong><span> Previously, Chrome offered <strong>third-party cookie deprecation trials</strong> to provide a way for sites or services experiencing breakage to request additional time to migrate away from third-party cookie dependencies. As explained in our blog post, <a href="https://developers-google-com.translate.goog/privacy-sandbox/blog/3pc-exceptions-update?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto">Updates to temporary third-party cookie exceptions in Chrome</a>, origins using the grace period don't need to deploy deprecation trial tokens; origins that have already deployed tokens don't need to keep them in place.</span> </aside> <p>Your application will be reviewed to ensure that the grace period exception is only used for site features that impact critical user journeys. To be eligible, sites must demonstrate functional breakage in user-facing journeys that are not related to advertising use cases. Chrome will institute checks to determine scripts and domains related to advertising. Applications are considered on a case-by-case basis.</p> <p>Chrome will work with <a href="https://translate.google.com/website?sl=auto&tl=en&hl=auto&u=https://disconnect.me/">disconnect.me</a>, an industry leader in internet privacy, and implement Disconnect's tracker protection lists to identify the scripts and domains categorized as advertising. Disconnect is already used by other browsers for similar purposes on the web.</p> <p>We will apply the following process to ascertain grace period eligibility:</p> <ul> <li>If the third-party origin matches a known advertising domain, including if the origin matches an entry on the Disconnect <a href="https://translate.google.com/website?sl=auto&tl=en&hl=auto&u=https://github.com/disconnectme/disconnect-tracking-protection/blob/master/services.json%23L1535C11-L1535C11">advertising list</a>, then the <strong>domain will not be eligible for the grace period</strong>. In general, entries on the list will match all subdomains below the specified origin. Some entries, however, include a path element. These more specific entries will match the given origin, but not subdomains.</li> <li>Steps to reproduce a broken user-facing experience must be provided. In particular, this should be an experience for the user operating the device where the cookie is stored, and not a user performing later analysis of data. If we cannot validate a broken user experience then the <strong>domain will not be eligible for the grace period</strong>.</li> <li>Otherwise the <strong>domain will be eligible</strong>.</li> </ul> <h2 id="disable_grace_period_for_testing" data-text="Disable grace period for testing" tabindex="-1">Disable grace period for testing</h2> <p>To test with the grace period disabled, even if your site has been granted access, set <code translate="no" dir="ltr">chrome://flags/#tpcd-metadata-grants</code> to <code translate="no" dir="ltr">Disabled</code>.</p> <p>Learn more: <a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/prepare/debug?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto#chrome_flags">Chrome flags for testing</a>.</p> <h2 id="opt-out_mechanism" data-text="Opt-out mechanism" tabindex="-1">Opt-out mechanism</h2> <p>Chrome is also providing a mechanism to allow sites to opt out of the grace period for a percentage of users. The opt-out mechanism will enable sites to run their own staged rollouts to help them transition away from relying on the grace period and move towards long-term solutions.</p> <p>Learn more: <a href="https://developers-google-com.translate.goog/privacy-sandbox/cookies/temporary-exceptions/grace-period-opt-out?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=auto">An opt-out mechanism for Chrome's third-party cookie grace period</a>.</p> </div><devsite-recommendations display="in-page" hidden yield> </devsite-recommendations> <devsite-thumb-rating position="footer"> </devsite-thumb-rating> <devsite-feedback position="footer" project-name="Privacy Sandbox" product-id="5335444" bucket="" context="" version="t-devsite-webserver-20241114-r00-rc02.464922260396498922" data-label="Send Feedback Button" track-type="feedback" track-name="sendFeedbackLink" track-metadata-position="footer" class="nocontent" disable-product-feedback project-icon="https://developers.google.com/static/privacy-sandbox/assets/images/privacy-sandbox-logo.png"> <button> Send feedback </button> </devsite-feedback> <devsite-recommendations id="recommendations-link" yield></devsite-recommendations> <div class="devsite-floating-action-buttons"> </div> </article> <devsite-content-footer class="nocontent"> <p>Except as otherwise noted, the content of this page is licensed under the <a href="https://translate.google.com/website?sl=auto&tl=en&hl=auto&u=https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 License</a>, and code samples are licensed under the <a href="https://translate.google.com/website?sl=auto&tl=en&hl=auto&u=https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 License</a>. 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