Examine source code of weathercock-detector

{
  "name": "weathercock-detector",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Google検索結果から詐欺サイトを非表示する",
  "icons": {
    "256": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "weathercock-detector@kwdev",
      "strict_min_version": "130.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "id": "weathercock-detector@kwdev",
      "strict_min_version": "130.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "https://*.gstatic.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.google.com/*",
        "*://www.google.co.jp/*"
      ],
      "css": [
        "hide.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://www.google.com/*",
        "*://www.google.co.jp/*"
      ],
      "run_at": "document_end",
      "js": [
        "content.js"
      ]
    }
  ]
}