Examine source code of Amazon Discount Finder

{
  "browser_action": {
    "default_icon": "icon128.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "css": [
        "style/jquery-ui-1.8.10.custom.css",
        "style/dd.css",
        "style/amazonfinder.css"
      ],
      "js": [
        "scripts/jquery.min.js",
        "scripts/jquery-ui.min.js",
        "scripts/jquery.watermark.js",
        "scripts/jquery.numeric.js",
        "scripts/jquery.selectboxes.min.js",
        "scripts/jquery.dd.js",
        "scripts/amazon.js"
      ],
      "matches": [
        "*://*.amazon.com/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.es/*",
        "*://*.amazon.it/*",
        "*://*.amazon.com.be/*",
        "*://*.amazon.de/*",
        "*://*.amazon.pl/*",
        "*://*.amazon.nl/*"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'"
  },
  "default_locale": "it",
  "description": "__MSG_extDescription__",
  "icons": {
    "16": "icon16.png",
    "19": "icon19.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ffb6491f-092b-4d2a-8dfe-87482cb5d390}"
    }
  },
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.0.39"
}