{
  "measured_at": "2026-07-11",
  "environment": {
    "machine": "Apple M5 Pro (Mac mini)",
    "os": "macOS 26.5.2 (Darwin 25.5.0)",
    "node": "v26.3.1",
    "chromium": "147.0.7727.15 (Playwright bundled, channel: chromium, headed)",
    "chromium_note": "branded Chrome stable は 137 以降 --load-extension を無視するため本ベンチには使用不可 (README 参照)。CRX 取得エンドポイントの prodversion パラメータは 140.0.0.0"
  },
  "protocol": {
    "trials_per_cell": 4,
    "warmup_navigations": 1,
    "format_wait_timeout_s": 60,
    "responsiveness_ping_timeout_s": 10,
    "median_rule": "4 試行の time_ms を昇順ソートし 2,3 番目の平均。hang/crash/skipped は +Infinity 扱い。中央値が Infinity のセルは非 formatted 判定"
  },
  "selector_verification": "extensions.json の selector_verification_note 参照。全 6 autoformat 拡張で実 DOM を検証済み (2026-07-11)。素の Chromium 147 は application/json ページに pre + div.json-formatter-container を挿入する (拡張なし baseline で実測) ため、これに一致する selector は偽陽性として排除済み",
  "store_listing": {
    "retrieved_at": "2026-07-11",
    "method": "WebFetch (Anthropic remote fetch) による Chrome ウェブストア掲載ページの転記。fetch_store_meta.mjs の draft と突き合わせてから results.json に採録する。fetch_store_meta.mjs の draft と突き合わせ済み (json-viewer-teocci のみ draft が Overview 節を誤取得したため転記値を CRX manifest version と照合して確定)"
  },
  "extensions": [
    {
      "slug": "jsonview",
      "name": "JSONView",
      "store_url": "https://chromewebstore.google.com/detail/jsonview/gmegofmjomhknnokphhckolhcffdaihd",
      "repo_url": "https://github.com/bhollis/jsonview",
      "open_source": true,
      "store_listing": {
        "version": "3.2.0",
        "size": "83.35KiB",
        "updated": "May 19, 2025",
        "users": "100,000",
        "source_url": "https://chromewebstore.google.com/detail/jsonview/gmegofmjomhknnokphhckolhcffdaihd",
        "retrieved_at": "2026-07-11"
      },
      "manifest_facts": {
        "version": "3.2.0",
        "manifest_version": 3,
        "permissions": [
          "webRequest",
          "storage"
        ],
        "host_permissions": [
          "<all_urls>"
        ],
        "content_script_matches": [
          "<all_urls>"
        ],
        "source": "crx_download",
        "crx_download_bytes": 85352,
        "crx_sha256": "360ab3ca2d0198195095177bd2a95fceea51c9108c06c846b0d39ecdc5000158",
        "fetched_at": "2026-07-11"
      },
      "autoformat": {
        "chromium_version": "147.0.7727.15",
        "sizes": {
          "1mb": {
            "outcome": "formatted",
            "trials": [
              {
                "outcome": "formatted",
                "time_ms": 8768
              },
              {
                "outcome": "formatted",
                "time_ms": 8493
              },
              {
                "outcome": "formatted",
                "time_ms": 8967
              },
              {
                "outcome": "formatted",
                "time_ms": 8844
              }
            ],
            "median_ms": 8806
          },
          "10mb": {
            "outcome": "hang",
            "trials": [
              {
                "outcome": "hang"
              },
              {
                "outcome": "hang"
              },
              {
                "outcome": "formatted",
                "time_ms": 19653
              },
              {
                "outcome": "hang"
              }
            ],
            "median_ms": null
          },
          "50mb": {
            "outcome": "not_tested_after_hang"
          },
          "100mb": {
            "outcome": "not_tested_after_hang"
          }
        }
      }
    },
    {
      "slug": "json-formatter",
      "name": "JSON Formatter",
      "store_url": "https://chromewebstore.google.com/detail/json-formatter/bcjindcccaagfpapjjmafapmmgkkhgoa",
      "repo_url": "https://github.com/callumlocke/json-formatter",
      "open_source": true,
      "store_listing": {
        "version": "0.10.2",
        "size": "20.35KiB",
        "updated": "May 16, 2026",
        "users": "2,000,000",
        "source_url": "https://chromewebstore.google.com/detail/json-formatter/bcjindcccaagfpapjjmafapmmgkkhgoa",
        "retrieved_at": "2026-07-11"
      },
      "manifest_facts": {
        "version": "0.10.2",
        "manifest_version": 3,
        "permissions": [
          "storage"
        ],
        "host_permissions": [
          "*://*/*",
          "<all_urls>"
        ],
        "content_script_matches": [
          "<all_urls>",
          "<all_urls>"
        ],
        "source": "crx_download",
        "crx_download_bytes": 20840,
        "crx_sha256": "5e0ebde71ee60f997a9f5fc0850e6ae4a9f67006dbf662f00507f99e957c2b21",
        "fetched_at": "2026-07-11"
      },
      "autoformat": {
        "chromium_version": "147.0.7727.15",
        "sizes": {
          "1mb": {
            "outcome": "formatted",
            "trials": [
              {
                "outcome": "formatted",
                "time_ms": 694
              },
              {
                "outcome": "formatted",
                "time_ms": 932
              },
              {
                "outcome": "formatted",
                "time_ms": 698
              },
              {
                "outcome": "formatted",
                "time_ms": 673
              }
            ],
            "median_ms": 696
          },
          "10mb": {
            "outcome": "skipped",
            "trials": [
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              }
            ],
            "median_ms": null
          },
          "50mb": {
            "outcome": "not_tested_after_hang"
          },
          "100mb": {
            "outcome": "not_tested_after_hang"
          }
        }
      }
    },
    {
      "slug": "formatarc",
      "name": "FormatArc",
      "store_url": "https://chromewebstore.google.com/detail/formatarc-%E2%80%94-json-yaml-csv/jlglgicneokhmfkhcnjfhlfbhppplkjl",
      "repo_url": "https://github.com/m-naoki-m/formatarc",
      "open_source": true,
      "store_listing": {
        "version": "1.2.1",
        "size": "122KiB",
        "updated": "June 15, 2026",
        "users": "11",
        "source_url": "https://chromewebstore.google.com/detail/formatarc-%E2%80%94-json-yaml-csv/jlglgicneokhmfkhcnjfhlfbhppplkjl",
        "retrieved_at": "2026-07-11"
      },
      "manifest_facts": {
        "version": "1.2.1",
        "manifest_version": 3,
        "permissions": [
          "contextMenus",
          "activeTab",
          "scripting"
        ],
        "host_permissions": [],
        "content_script_matches": [],
        "source": "local_dist",
        "crx_download_bytes": null,
        "crx_sha256": null,
        "fetched_at": "2026-07-11"
      },
      "autoformat": {
        "outcome": "not_applicable",
        "note": "ポップアップ型 (activeTab のみ)。ページ自動整形機能を持たないため自動整形上限は N/A。ローカル chrome-extension/dist/ から manifest を読む (CRX ダウンロード不要)"
      }
    },
    {
      "slug": "json-viewer-pro",
      "name": "JSON Viewer Pro",
      "store_url": "https://chromewebstore.google.com/detail/json-viewer-pro/eifflpmocdbdmepbjaopkkhbfmdgijcc",
      "repo_url": "https://github.com/rbrahul/Awesome-JSON-Viewer",
      "open_source": true,
      "store_listing": {
        "version": "1.0.6",
        "size": "479KiB",
        "updated": "April 15, 2025",
        "users": "300,000",
        "source_url": "https://chromewebstore.google.com/detail/json-viewer-pro/eifflpmocdbdmepbjaopkkhbfmdgijcc",
        "retrieved_at": "2026-07-11"
      },
      "manifest_facts": {
        "version": "1.0.6",
        "manifest_version": 3,
        "permissions": [
          "contextMenus",
          "storage"
        ],
        "host_permissions": [
          "*://*/*"
        ],
        "content_script_matches": [
          "http://*/*",
          "https://*/*",
          "ftp://*/*",
          "file:///*",
          "*://*/*"
        ],
        "source": "crx_download",
        "crx_download_bytes": 490250,
        "crx_sha256": "0f943833d1fe4b39da820131b553cc11d957ce9ef6cea540325d8488469b2d95",
        "fetched_at": "2026-07-11"
      },
      "autoformat": {
        "chromium_version": "147.0.7727.15",
        "sizes": {
          "1mb": {
            "outcome": "formatted",
            "trials": [
              {
                "outcome": "formatted",
                "time_ms": 1618
              },
              {
                "outcome": "formatted",
                "time_ms": 1823
              },
              {
                "outcome": "formatted",
                "time_ms": 1455
              },
              {
                "outcome": "formatted",
                "time_ms": 1530
              }
            ],
            "median_ms": 1574
          },
          "10mb": {
            "outcome": "formatted",
            "trials": [
              {
                "outcome": "formatted",
                "time_ms": 14276
              },
              {
                "outcome": "formatted",
                "time_ms": 14365
              },
              {
                "outcome": "formatted",
                "time_ms": 14239
              },
              {
                "outcome": "formatted",
                "time_ms": 14019
              }
            ],
            "median_ms": 14258
          },
          "50mb": {
            "outcome": "hang",
            "trials": [
              {
                "outcome": "hang"
              },
              {
                "outcome": "hang"
              },
              {
                "outcome": "hang"
              },
              {
                "outcome": "hang"
              }
            ],
            "median_ms": null
          },
          "100mb": {
            "outcome": "not_tested_after_hang"
          }
        },
        "run_note": "実行環境の制約で 2 run に分割 (run 1: 1mb,10mb / run 2: 50mb、いずれも warmup 1 + 本試行 4 のプロトコル遵守、サイズ昇順維持)。50mb が hang 判定のため 100mb はプロトコル通り not_tested_after_hang"
      }
    },
    {
      "slug": "json-lite",
      "name": "JSON Lite",
      "store_url": "https://chromewebstore.google.com/detail/json-lite/acacmjcicejlmjcheoklfdchempahoag",
      "repo_url": "https://github.com/lauriro/json-lite",
      "open_source": true,
      "store_listing": {
        "version": "24.6.3",
        "size": "23.65KiB",
        "updated": "June 10, 2024",
        "users": "20,000",
        "source_url": "https://chromewebstore.google.com/detail/json-lite/acacmjcicejlmjcheoklfdchempahoag",
        "retrieved_at": "2026-07-11"
      },
      "manifest_facts": {
        "version": "24.6.3",
        "manifest_version": 3,
        "permissions": [
          "contextMenus",
          "storage",
          "activeTab",
          "tabs",
          "scripting"
        ],
        "host_permissions": [
          "<all_urls>"
        ],
        "content_script_matches": [
          "<all_urls>"
        ],
        "source": "crx_download",
        "crx_download_bytes": 24213,
        "crx_sha256": "6aae4f7055caf6e0c8ce5b884f5dd19f7b1bbab06427fed37c6062c525fa1a99",
        "fetched_at": "2026-07-11"
      },
      "autoformat": {
        "chromium_version": "147.0.7727.15",
        "sizes": {
          "1mb": {
            "outcome": "formatted",
            "trials": [
              {
                "outcome": "formatted",
                "time_ms": 558
              },
              {
                "outcome": "formatted",
                "time_ms": 408
              },
              {
                "outcome": "formatted",
                "time_ms": 552
              },
              {
                "outcome": "formatted",
                "time_ms": 803
              }
            ],
            "median_ms": 555
          },
          "10mb": {
            "outcome": "formatted",
            "trials": [
              {
                "outcome": "formatted",
                "time_ms": 3782
              },
              {
                "outcome": "formatted",
                "time_ms": 1747
              },
              {
                "outcome": "formatted",
                "time_ms": 1847
              },
              {
                "outcome": "formatted",
                "time_ms": 1856
              }
            ],
            "median_ms": 1852
          },
          "50mb": {
            "outcome": "skipped",
            "trials": [
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              }
            ],
            "median_ms": null
          },
          "100mb": {
            "outcome": "not_tested_after_hang"
          }
        }
      }
    },
    {
      "slug": "json-viewer-teocci",
      "name": "JSON Viewer (teocci)",
      "store_url": "https://chromewebstore.google.com/detail/json-viewer/aimiinbnnkboelefkjlenlgimcabobli",
      "repo_url": "https://github.com/teocci/json-viewer",
      "open_source": true,
      "store_listing": {
        "version": "1.0.3",
        "size": "104KiB",
        "updated": "February 24, 2024",
        "users": "100,000",
        "source_url": "https://chromewebstore.google.com/detail/json-viewer/aimiinbnnkboelefkjlenlgimcabobli",
        "retrieved_at": "2026-07-11"
      },
      "manifest_facts": {
        "version": "1.0.3",
        "manifest_version": 3,
        "permissions": [
          "clipboardWrite",
          "scripting",
          "activeTab",
          "contextMenus",
          "storage"
        ],
        "host_permissions": [
          "*://*/*",
          "<all_urls>"
        ],
        "content_script_matches": [
          "<all_urls>"
        ],
        "source": "crx_download",
        "crx_download_bytes": 106620,
        "crx_sha256": "7385b4ada5beb173caaa248b646e7a98a3b90d1739dbfbd67883ec4d91e17a10",
        "fetched_at": "2026-07-11"
      },
      "autoformat": {
        "chromium_version": "147.0.7727.15",
        "sizes": {
          "1mb": {
            "outcome": "formatted",
            "trials": [
              {
                "outcome": "formatted",
                "time_ms": 2536
              },
              {
                "outcome": "formatted",
                "time_ms": 2567
              },
              {
                "outcome": "formatted",
                "time_ms": 2553
              },
              {
                "outcome": "formatted",
                "time_ms": 2569
              }
            ],
            "median_ms": 2560
          },
          "10mb": {
            "outcome": "skipped",
            "trials": [
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              },
              {
                "outcome": "skipped"
              }
            ],
            "median_ms": null
          },
          "50mb": {
            "outcome": "not_tested_after_hang"
          },
          "100mb": {
            "outcome": "not_tested_after_hang"
          }
        }
      }
    },
    {
      "slug": "simple-json-viewer",
      "name": "Simple JSON Viewer",
      "store_url": "https://chrome.google.com/webstore/detail/simple-json-viewer/biifbpljkjdpdfioebhhpcbiehhcckop",
      "repo_url": null,
      "open_source": false,
      "store_listing": {
        "version": "1.0",
        "size": "8.6KiB",
        "updated": "May 10, 2020",
        "users": "52",
        "source_url": "https://chromewebstore.google.com/detail/simple-json-viewer/biifbpljkjdpdfioebhhpcbiehhcckop",
        "retrieved_at": "2026-07-11"
      },
      "manifest_facts": {
        "version": "1.0",
        "manifest_version": 2,
        "permissions": [],
        "host_permissions": [],
        "content_script_matches": [
          "*://*/*"
        ],
        "source": "crx_download",
        "crx_download_bytes": 8803,
        "crx_sha256": "d9049d64ded371707e725f88e67b363c9dce4abbbd4aa3fe1e90fc0073593a7f",
        "fetched_at": "2026-07-11"
      },
      "autoformat": {
        "chromium_version": "147.0.7727.15",
        "sizes": null,
        "outcome": "not_loadable",
        "evidence": "Manifest V2 (manifest_version=2 を CRX 展開で実測)。Playwright Chromium 147.0.7727.15 で --load-extension 指定時に launchPersistentContext が 180 秒 timeout (残存プロセス 0 の清浄環境で 2 回再現、他 5 拡張は同条件で正常起動)。ブラウザ起動自体が完了しないため autoformat 測定不能"
      }
    }
  ]
}