Cell F8 (ENG-2592). First-party request matched by an additional-engine (force-tier) rule: Brave blocks it in Standard, because only the default engine is first-party-protected (N10). Its default-tier twin F8b is allowed in Standard. Red first: a build before Networking #214 allows F8 in Standard.
Rows, rules and Brave's verdicts are in pages/network-fixtures.json. The runner grades from CDP, never from this page.