Examine source code of Amazon Product Cleaner

{
  "manifest_version": 2,
  "name": "Amazon Product Cleaner",
  "version": "1.0",
  "description": "Hides Amazon Basics and sponsored (promoted) items on Amazon's search results pages.",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.amazon.com/*",
        "https://*.amazon.co.uk/*",
        "https://*.amazon.ca/*",
        "https://*.amazon.de/*",
        "https://*.amazon.es/*",
        "https://*.amazon.fr/*",
        "https://*.amazon.it/*",
        "https://*.amazon.co.jp/*"
      ],
      "js": [
        "hide-amazon-items.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "https://*.amazon.com/*",
    "https://*.amazon.co.uk/*",
    "https://*.amazon.ca/*",
    "https://*.amazon.de/*",
    "https://*.amazon.es/*",
    "https://*.amazon.fr/*",
    "https://*.amazon.it/*",
    "https://*.amazon.co.jp/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "amazon-product-cleaner@example.com",
      "strict_min_version": "60.0"
    }
  }
}