Examine source code of Comparateur de prix Amazon

{
  "manifest_version": 2,
  "name": "TASTECH | Amazon price comparison tool",
  "version": "1.4.4",
  "description": "Compare the prices of Amazon products in different European countries.",
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@tastech.fr",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "websiteActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.fr/*",
        "https://www.amazon.it/*",
        "https://www.amazon.com.be/*",
        "https://www.amazon.co.uk/*",
        "https://www.amazon.es/*",
        "https://www.amazon.de/*",
        "https://www.amazon.se/*",
        "https://www.amazon.pl/*",
        "https://www.amazon.nl/*",
        "https://www.amazon.ie/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "https://www.amazon.fr/*",
    "https://www.amazon.it/*",
    "https://www.amazon.com.be/*",
    "https://www.amazon.co.uk/*",
    "https://www.amazon.es/*",
    "https://www.amazon.de/*",
    "https://www.amazon.se/*",
    "https://www.amazon.pl/*",
    "https://www.amazon.nl/*",
    "https://www.amazon.ie/*",
    "https://cdnjs.cloudflare.com/*",
    "https://open.er-api.com/*",
    "https://flagicons.lipis.dev/*",
    "https://fonts.googleapis.com/*",
    "https://fonts.gstatic.com/*"
  ],
  "options_page": "options.html",
  "icons": {
    "16": "img/16x16.png",
    "32": "img/32x32.png",
    "48": "img/48x48.png",
    "128": "img/128x128.png"
  }
}