Examine source code of Twitter Flags

{
  "manifest_version": 3,
  "name": "Twitter Flags",
  "version": "1.1.1",
  "description": "Displays country of origin flags on Twitter profiles",
  "browser_specific_settings": {
    "gecko": {
      "id": "twitter-flags@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [],
  "host_permissions": [
    "https://x.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "inject.js"
      ],
      "matches": [
        "https://x.com/*"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}