Examine source code of Sea Battle Duel

{
  "manifest_version": 2,
  "name": "Sea Battle Duel",
  "version": "2.4.1",
  "description": "Classic 10x10 naval battle against a computer opponent that hunts your fleet with real targeting logic.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{bb172d37-0f50-4dba-8fb7-a48ca357e9f7}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_title": "Sea Battle Duel",
    "default_popup": "src/popup.html",
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    }
  },
  "permissions": [
    "storage"
  ]
}