{
  "schemaVersion": "bc-lifecycle-record-1",
  "product": "native-chrome",
  "headed": true,
  "origin": "http://127.0.0.1:8788",
  "browser": "Chrome/152.0.7977.83",
  "testVersions": [
    "bc-environment-1",
    "bc-storage-1",
    "bc-baseline-1"
  ],
  "repeats": 10,
  "recordedAt": "2026-09-12T03:48:46.260Z",
  "configuration": "Two fresh, separate Chrome user-data directories; no account, extensions, proxy override, UA override or device emulation. CDP controls UI actions and closes the entire browser gracefully. Background networking and sync disabled. Analytics consent denied. No platform accounts used.",
  "initialObservation": {
    "testVersion": "bc-environment-1",
    "selectedProduct": "unspecified",
    "productVersion": "",
    "identity": "user-selected-not-verified",
    "observedAt": "2026-09-12T03:48:29.205Z",
    "values": {
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      "reportedOS": "macOS",
      "platform": "MacIntel",
      "clientHintsPlatform": "macOS",
      "language": "zh-CN",
      "timezone": "Asia/Shanghai",
      "screen": "1512 × 982 · DPR 2",
      "webgl2": "available",
      "renderer": "WebKit WebGL",
      "localStorage": "available"
    }
  },
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        },
        {
          "signal": "Reported OS family",
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          "baseline": "macOS"
        },
        {
          "signal": "Navigator platform",
          "current": "MacIntel",
          "baseline": "MacIntel"
        },
        {
          "signal": "Client Hints platform",
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          "baseline": "macOS"
        },
        {
          "signal": "Browser language",
          "current": "zh-CN",
          "baseline": "zh-CN"
        },
        {
          "signal": "Browser time zone",
          "current": "Asia/Shanghai",
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        },
        {
          "signal": "Screen & pixel ratio",
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          "baseline": "1512 × 982 · DPR 2"
        },
        {
          "signal": "WebGL2 context",
          "current": "Available in this run",
          "baseline": "Available in this run"
        },
        {
          "signal": "WebGL2 renderer (reported)",
          "current": "WebKit WebGL",
          "baseline": "WebKit WebGL"
        },
        {
          "signal": "Local storage write / read",
          "current": "Available in this run",
          "baseline": "Available in this run"
        }
      ]
    },
    {
      "phase": "read-B",
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      "isolation": {
        "cookie": "missing",
        "localStorage": "missing",
        "indexedDB": "missing"
      }
    },
    {
      "phase": "reopen-A",
      "run": 2,
      "observedAt": "2026-09-12T03:48:31.606Z",
      "persistence": {
        "cookie": "present",
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      },
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        {
          "signal": "Reported browser / version",
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        },
        {
          "signal": "Reported OS family",
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        },
        {
          "signal": "Navigator platform",
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        },
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        },
        {
          "signal": "Browser language",
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        },
        {
          "signal": "Browser time zone",
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        },
        {
          "signal": "Screen & pixel ratio",
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        },
        {
          "signal": "WebGL2 context",
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        },
        {
          "signal": "WebGL2 renderer (reported)",
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        },
        {
          "signal": "Local storage write / read",
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        }
      ]
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        "indexedDB": "missing"
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        },
        {
          "signal": "Navigator platform",
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        },
        {
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        },
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          "signal": "Browser language",
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        },
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          "signal": "Browser time zone",
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        },
        {
          "signal": "Screen & pixel ratio",
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          "baseline": "1512 × 982 · DPR 2"
        },
        {
          "signal": "WebGL2 context",
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          "baseline": "Available in this run"
        },
        {
          "signal": "WebGL2 renderer (reported)",
          "current": "WebKit WebGL",
          "baseline": "WebKit WebGL"
        },
        {
          "signal": "Local storage write / read",
          "current": "Available in this run",
          "baseline": "Available in this run"
        }
      ]
    },
    {
      "phase": "read-B",
      "run": 3,
      "observedAt": "2026-09-12T03:48:33.840Z",
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        "indexedDB": "missing"
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    },
    {
      "phase": "reopen-A",
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      "observedAt": "2026-09-12T03:48:34.577Z",
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      },
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        {
          "signal": "Reported browser / version",
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        },
        {
          "signal": "Reported OS family",
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        },
        {
          "signal": "Navigator platform",
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        },
        {
          "signal": "Client Hints platform",
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          "baseline": "macOS"
        },
        {
          "signal": "Browser language",
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          "baseline": "zh-CN"
        },
        {
          "signal": "Browser time zone",
          "current": "Asia/Shanghai",
          "baseline": "Asia/Shanghai"
        },
        {
          "signal": "Screen & pixel ratio",
          "current": "1512 × 982 · DPR 2",
          "baseline": "1512 × 982 · DPR 2"
        },
        {
          "signal": "WebGL2 context",
          "current": "Available in this run",
          "baseline": "Available in this run"
        },
        {
          "signal": "WebGL2 renderer (reported)",
          "current": "WebKit WebGL",
          "baseline": "WebKit WebGL"
        },
        {
          "signal": "Local storage write / read",
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          "baseline": "Available in this run"
        }
      ]
    },
    {
      "phase": "read-B",
      "run": 4,
      "observedAt": "2026-09-12T03:48:35.268Z",
      "isolation": {
        "cookie": "missing",
        "localStorage": "missing",
        "indexedDB": "missing"
      }
    },
    {
      "phase": "reopen-A",
      "run": 5,
      "observedAt": "2026-09-12T03:48:36.065Z",
      "persistence": {
        "cookie": "present",
        "localStorage": "present",
        "indexedDB": "present"
      },
      "changed": [],
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        {
          "signal": "Reported browser / version",
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        },
        {
          "signal": "Reported OS family",
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          "baseline": "macOS"
        },
        {
          "signal": "Navigator platform",
          "current": "MacIntel",
          "baseline": "MacIntel"
        },
        {
          "signal": "Client Hints platform",
          "current": "macOS",
          "baseline": "macOS"
        },
        {
          "signal": "Browser language",
          "current": "zh-CN",
          "baseline": "zh-CN"
        },
        {
          "signal": "Browser time zone",
          "current": "Asia/Shanghai",
          "baseline": "Asia/Shanghai"
        },
        {
          "signal": "Screen & pixel ratio",
          "current": "1512 × 982 · DPR 2",
          "baseline": "1512 × 982 · DPR 2"
        },
        {
          "signal": "WebGL2 context",
          "current": "Available in this run",
          "baseline": "Available in this run"
        },
        {
          "signal": "WebGL2 renderer (reported)",
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          "baseline": "WebKit WebGL"
        },
        {
          "signal": "Local storage write / read",
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          "baseline": "Available in this run"
        }
      ]
    },
    {
      "phase": "read-B",
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      },
      "changed": [],
      "observations": [
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          "signal": "Reported browser / version",
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          "baseline": "Chrome 152.0.0.0"
        },
        {
          "signal": "Reported OS family",
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          "baseline": "macOS"
        },
        {
          "signal": "Navigator platform",
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        },
        {
          "signal": "Client Hints platform",
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          "baseline": "macOS"
        },
        {
          "signal": "Browser language",
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        },
        {
          "signal": "Browser time zone",
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        },
        {
          "signal": "Screen & pixel ratio",
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          "baseline": "1512 × 982 · DPR 2"
        },
        {
          "signal": "WebGL2 context",
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          "baseline": "Available in this run"
        },
        {
          "signal": "WebGL2 renderer (reported)",
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        },
        {
          "signal": "Local storage write / read",
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        }
      ]
    },
    {
      "phase": "read-B",
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      "observedAt": "2026-09-12T03:48:38.334Z",
      "isolation": {
        "cookie": "missing",
        "localStorage": "missing",
        "indexedDB": "missing"
      }
    },
    {
      "phase": "reopen-A",
      "run": 7,
      "observedAt": "2026-09-12T03:48:39.105Z",
      "persistence": {
        "cookie": "present",
        "localStorage": "present",
        "indexedDB": "present"
      },
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        {
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        },
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        },
        {
          "signal": "Navigator platform",
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        },
        {
          "signal": "Client Hints platform",
          "current": "macOS",
          "baseline": "macOS"
        },
        {
          "signal": "Browser language",
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        },
        {
          "signal": "Browser time zone",
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        },
        {
          "signal": "Screen & pixel ratio",
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        },
        {
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        },
        {
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          "baseline": "WebKit WebGL"
        },
        {
          "signal": "Local storage write / read",
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          "baseline": "Available in this run"
        }
      ]
    },
    {
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      "observedAt": "2026-09-12T03:48:39.834Z",
      "isolation": {
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        "indexedDB": "missing"
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    },
    {
      "phase": "reopen-A",
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        "indexedDB": "present"
      },
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        },
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        {
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        },
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        },
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        }
      ]
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    },
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        },
        {
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        },
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        }
      ]
    },
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    },
    {
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        },
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          "baseline": "Asia/Shanghai"
        },
        {
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          "baseline": "1512 × 982 · DPR 2"
        },
        {
          "signal": "WebGL2 context",
          "current": "Available in this run",
          "baseline": "Available in this run"
        },
        {
          "signal": "WebGL2 renderer (reported)",
          "current": "WebKit WebGL",
          "baseline": "WebKit WebGL"
        },
        {
          "signal": "Local storage write / read",
          "current": "Available in this run",
          "baseline": "Available in this run"
        }
      ]
    },
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      }
    }
  ],
  "cleanup": {
    "cookie": "missing",
    "localStorage": "missing",
    "indexedDB": "missing"
  },
  "unrelatedPreferencePreserved": true,
  "notTested": [
    "Vendor browsers",
    "RAM",
    "CPU",
    "Launch duration",
    "Cross-device sync",
    "Browser upgrades",
    "Other origins",
    "Account survival",
    "Detection bypass"
  ],
  "device": {
    "os": "macOS 26.5.2",
    "model": "Mac17,9",
    "processor": "Apple M5 Pro",
    "memoryGiB": 48
  },
  "build": {
    "mode": "Local production Cloudflare Worker preview",
    "parentCommit": "7c3592d86c2a810a07b70ca02d8c511efc389db3",
    "sourceSha256": {
      "src/lib/lab-storage.ts": "badbce3d3d41a9e35e3e82f3c67fb41187d44851a8c02d4a8a8142f7fed19553",
      "src/lib/lab-observation.ts": "6bb5723a10c56403d0cac89c2b27e6e6d5dc6d35fe002c9a5f3487fa9723b064",
      "src/components/antidetect/LabStorageChecks.tsx": "da3d9fd28e3f779109cdcb7204aa995711426fbf1138fa12847637747314494a",
      "src/components/antidetect/ProductSelfTest.tsx": "252613e680a9876c5ca4e12c7570dd863f88768dcc8bbe0062b7308c4da8b6af",
      "scripts/verify-lab-lifecycle.mjs": "f9c6a043a1e614a3b9d8ff9f03cd3593f20dedc75f6144e105ccc89b98e3e7df"
    }
  },
  "limitations": [
    "Single device and same-day short sessions; not long-term reliability.",
    "BrowserCheck served from a local production Worker preview, not a production-origin test.",
    "CDP-controlled headed Chrome; automation flags may affect the environment.",
    "The in-page UA reports a reduced version and a generic WebGL renderer; neither identifies the full installed version or physical GPU.",
    "Deliberate QA overrides in a third profile are excluded from the measurement runs."
  ]
}