Examine source code of Amazon Wishlist Subtotal

{
  "description": "Displays a notice including wish list number of items and wish list subtotal.",
  "manifest_version": 2,
  "name": "Amazon Wishlist Subtotal",
  "version": "1.1resigned1",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/gp/registry/wishlist/*"
      ],
      "js": [
        "js/jquery.js",
        "js/tooltipster.bundle.min.js",
        "js/wishlist_subtotal.js"
      ],
      "css": [
        "css/tooltipster.bundle.min.css",
        "css/style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8a54276b-491a-4d7d-95d3-63ffa8c0991e}"
    }
  }
}