[w3ctag/design-reviews] Add prefetchCache and prerenderCache to Clear-Site-Data header (Issue #1091)

srwei created an issue (w3ctag/design-reviews#1091)

こんにちは TAG-さん!

I'm requesting a TAG review of the feature for adding _prefetchCache_ and _prerenderCache_ values to Clear-Site-Data header.

We propose adding two new values to the [Clear-Site-Data](https://w3c.github.io/webappsec-clear-site-data/#header) header to help developers target clearing the prerender and prefetch cache: _prefetchCache_ and _prerenderCache_.

  - Explainer¹: https://github.com/WICG/nav-speculation/blob/main/clear-site-data-integration.md
  - Specification: https://wicg.github.io/nav-speculation/
  - WPT Tests: https://github.com/web-platform-tests/wpt/pull/52223
  - User research: none
  - Security and Privacy self-review²: https://github.com/WICG/nav-speculation/blob/main/clear-site-data-integration.md#w3c-tag-security-and-privacy-questionnaire-answers
  - GitHub repo: 
  - Primary contacts:
  - Organization/project driving the specification: Chromium
  - This work is being funded by: Microsoft
  - Primary standards group developing this feature: WICG
  - Group intended to standardize this work: WHATWG  https://github.com/whatwg/html/issues/11123 https://w3c.github.io/webappsec-clear-site-data/
  - Incubation and standards groups that have discussed the design: https://github.com/WICG/nav-speculation/issues/357
  - Multi-stakeholder support³:
    - Chromium comments: https://chromium-review.googlesource.com/c/chromium/src/+/6456388?tab=comments
    - Mozilla comments: https://github.com/mozilla/standards-positions/issues/1214
    - WebKit comments: https://github.com/WebKit/standards-positions/issues/488
  - Major unresolved issues with or opposition to this specification: None
  - Status/issue trackers for implementations⁴: https://chromestatus.com/feature/4755745652080640

Further details:

  - [x] I have reviewed the TAG's [Web Platform Design Principles](https://www.w3.org/TR/design-principles/)
  - Previous early design review, if any: https://github.com/w3ctag/design-reviews/issues/####
  - Relevant time constraints or deadlines:


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Received on Monday, 12 May 2025 20:39:38 UTC