Add Storage Access API page (privacy, optional)#76
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New spec page documenting the W3C Privacy CG Storage Access API — the standard way for embedded cross-site content to request its own unpartitioned cookies behind a user gesture as browsers partition and block third-party cookies. Marked `optional`: it only applies to sites embedding cross-site content that needs first-party state (SSO, federated identity, signed-in widgets), and has shipped in all engines for years. Wires relatedSlugs on third-party-scripts, cookie-attributes, and permissions-policy; adds an `added` changelog entry; regenerates the count-driven OG images plus the new per-page image. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What changed
Adds a new spec page: Storage Access API under
privacy.<iframe>requests access to its own unpartitioned third-party cookies/state — behind a user gesture (transient activation), gated by user prompts and prior first-party interaction.SameSite=None; Securecookies, secure context, theallow-storage-access-by-user-activationsandbox token, thestorage-accessPermissions-Policy gate, and theSec-Fetch-Storage-Access/Activate-Storage-Accessheader workflow.relatedSlugsboth ways withthird-party-scripts,security/cookie-attributes, andsecurity/permissions-policy.addedchangelog entry and regenerates the count-driven OG images plus the new per-page image.Why now
Third-party cookies are being partitioned/blocked by default (Firefox Total Cookie Protection, Safari ITP, Chrome following). The Storage Access API is the standards-track replacement for the old "please disable your tracking protection" workaround — it restores access for legitimate cross-site cases (SSO, federated identity, personalisation widgets) without reopening the site to tracking. Cross-engine support is mature: Safari 11.1 (2018), Firefox 65 (2019), Edge 85 (2020), Chrome 119 (2023).
Primary source(s)
Document.requestStorageAccess()(context): https://developer.mozilla.org/en-US/docs/Web/API/Document/requestStorageAccessStatus:
optional— justificationIt genuinely depends on context (CONTRIBUTING's definition of
optional): the API only matters to sites that embed cross-site content needing first-party cookies/state. A standalone first-party site that sets its own cookies never needs it. Sooptional, notrecommended— honest about who it applies to, rather than inflating the bar.Notes
Linkheader change.npm run buildpasses (157 pages indexed); lint + prettier clean via pre-commit hook.Opened as a draft by the daily standards scan for maintainer review — not for auto-merge.
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