Examine source code of Amazon Redirect Plus

{
  "manifest_version": 2,
  "name": "Amazon Redirect Plus",
  "version": "2.4",
  "description": "This extension adds a convenient widget to Amazon product pages, enabling seamless switching between various regional storefronts.",
  "homepage_url": "https://github.com/faizanhemotra/amazon-redirect-plus",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.amazon.ae/*",
        "*://www.amazon.ca/*",
        "*://www.amazon.co.jp/*",
        "*://www.amazon.co.uk/*",
        "*://www.amazon.co.za/*",
        "*://www.amazon.com/*",
        "*://www.amazon.com.au/*",
        "*://www.amazon.com.be/*",
        "*://www.amazon.com.br/*",
        "*://www.amazon.com.mx/*",
        "*://www.amazon.de/*",
        "*://www.amazon.eg/*",
        "*://www.amazon.es/*",
        "*://www.amazon.fr/*",
        "*://www.amazon.in/*",
        "*://www.amazon.it/*",
        "*://www.amazon.nl/*",
        "*://www.amazon.se/*",
        "*://www.amazon.sg/*"
      ],
      "js": [
        "/common/amazonFronts.js",
        "contentScript.js",
        "warehouseDeals.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "/background/background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "/options/options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_popup": "/options/options.html"
  },
  "icons": {
    "16": "/resources/icon.svg",
    "20": "/resources/icon.svg",
    "24": "/resources/icon.svg",
    "32": "/resources/icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b0c7f4f1-008e-4e3b-8617-6903b38b5c27}"
    }
  }
}