Examine source code of Supremacy Utilities

{
  "manifest_version": 3,
  "name": "Supremacy Utilities",
  "version": "16.19.1",
  "description": "Utility tools for Supremacy game.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.supremacy1914.com/*",
        "*://*.supremacy1914.de/*",
        "*://*.supremacy1914.fr/*",
        "*://*.supremacy1914.gr/*",
        "*://*.supremacy1914.it/*",
        "*://*.supremacy1914.nl/*",
        "*://*.supremacy1914.pl/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "injected.js",
        "apiresponses/*",
        "**/*.js",
        "**/*.html",
        "**/*.css",
        "**/*.scss",
        "icons/*",
        "**/*.png",
        "**/*.jpg",
        "**/*.jpeg",
        "**/*.gif",
        "**/*.svg"
      ],
      "matches": [
        "*://*.supremacy1914.com/*",
        "*://*.supremacy1914.de/*",
        "*://*.supremacy1914.fr/*",
        "*://*.supremacy1914.gr/*",
        "*://*.supremacy1914.it/*",
        "*://*.supremacy1914.nl/*",
        "*://*.supremacy1914.pl/*"
      ]
    }
  ],
  "permissions": [
    "declarativeNetRequest",
    "storage"
  ],
  "host_permissions": [
    "*://*.supremacy1914.com/*",
    "*://*.supremacy1914.de/*",
    "*://*.supremacy1914.fr/*",
    "*://*.supremacy1914.gr/*",
    "*://*.supremacy1914.it/*",
    "*://*.supremacy1914.nl/*",
    "*://*.supremacy1914.pl/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "mock_rules",
        "enabled": false,
        "path": "rules.json"
      }
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "supremacy-utilities@yourdomain.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}