Amazon Price Tracker like Keepa but Free

manifest.json

{
  "action": {
    "default_icon": "icon.png"
  },
  "content_scripts": [
    {
      "js": [
        "comparateurPourAmazon.js"
      ],
      "matches": [
        "*://*.amazon.ae/*",
        "*://*.amazon.at/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.cn/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.com.au/*",
        "*://*.amazon.com.br/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.com.sg/*",
        "*://*.amazon.com.tr/*",
        "*://*.amazon.com/*",
        "*://*.amazon.de/*",
        "*://*.amazon.es/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.ie/*",
        "*://*.amazon.in/*",
        "*://*.amazon.it/*",
        "*://*.amazon.nl/*",
        "*://*.amazon.eg/*",
        "*://*.amazon.sa/*"
      ]
    }
  ],
  "description": "See & track the historical price of any item on Amazon.",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjT5pdE5Ntcoo9gOdI0xBhonzNXPiT8XNxGKY79fk2Pp83g60Y25UxZQhcAQK+FnwgiqdL7mGy4dcWcshIKU9rRaMAQg7OdxdnGADa0V0Q/HdkbNo4RsITv7oBSot+YP3dI0TZkG6jAEPxP8r26JKJp+oAPLcbs3Un3SZSDFTqQXZZYXaVyEhf8KYQ2b6cv3m3KtN0t1ZzyrHGBQ7sWFyKxgafYDuozG6PgHRN2+oAWjgi+QrsR54Vw4TxCKDRLKNQbkJTPcnsLcBBYZpEUhR+5yZe6u22M0eYRgY0T2V8D9Igr5fNAbVEEP1myGvg+4qliMiWI4n9u5cYTbBMmmTAQIDAQAB",
  "manifest_version": 3,
  "name": "Amazon Price Tracker like Keepa but Free",
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.1.4"
}