Examine source code of Ikariam Mobile Fix

{
  "manifest_version": 3,
  "name": "Ikariam Mobile Fix",
  "version": "1.1.0",
  "description": "Improves the Ikariam web interface on mobile screens.",
  "browser_specific_settings": {
    "gecko": {
      "id": "ikariam-mobile-fix@javadmosv.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://ikariam.gameforge.com/*",
        "*://*.ikariam.gameforge.com/*"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_start"
    }
  ]
}