Examine source code of xflags

{
  "manifest_version": 3,
  "name": "xflags",
  "version": "1.1.0",
  "description": "Shows country flags next to X (Twitter) usernames based on account location",
  "author": "bitlamas",
  "homepage_url": "https://github.com/bitlamas/xflags",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background/service-worker.js"
    ]
  },
  "host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "utils/browser-compat.js",
        "utils/country-flags.js",
        "utils/cache.js",
        "utils/logger.js",
        "utils/console-logger.js",
        "utils/api-data-extractor.js",
        "content-scripts/flag-renderer.js",
        "content-scripts/active-fetcher.js",
        "content-scripts/observer.js",
        "content-scripts/main.js"
      ],
      "css": [
        "styles/flags.css"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content-scripts/interceptor.js",
        "icons/flags/*.png"
      ],
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ]
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "xflags",
    "default_icon": {
      "48": "icons/icon48.png",
      "96": "icons/icon96.png",
      "128": "icons/icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "x-country-flags@xflag.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}