1. CSS Paged Media (@page)

    CSS at-rule (`@page`) to define page-specific rules when printing web pages, such as margin per page and page dimensions.

  2. css at-rule: `@media`: `aspect-ratio` media feature

  3. css at-rule: `@media`: `device-aspect-ratio` media feature

  4. css at-rule: `@media`: `prefers-color-scheme` media feature: respects `color-scheme` inherited from parent

  5. html element: script: type: `type="speculationrules"`

  6. html element: script: type: `type="speculationrules"`: `prefetch` key

  7. html element: script: type: `type="speculationrules"`: `prerender` key

  8. html element: script: type: `type="speculationrules"`: `referrer_policy` key

  9. html element: script: type: `type="speculationrules"`: `requires` key

  10. html element: script: type: `type="speculationrules"`: `requires` key: `anonymous-client-ip-when-cross-origin` value

  11. html element: script: type: `type="speculationrules"`: `urls` key

  12. html element: script: type: `type="speculationrules"`: `where` key

  13. headers http header: content-security-policy: script-src: `inline-speculation-rules` source expression

  14. headers http header: sec-purpose: `sec-purpose` for `<script type="speculationrules">` prefetch