Examine source code of Lowvyn

{
  "manifest_version": 3,
  "name": "Lowvyn",
  "version": "7.7.2",
  "description": "Track prices on Amazon, Walmart, and Best Buy Canada. See price history, get drop alerts, and spot real deals.",
  "browser_specific_settings": {
    "gecko": {
      "id": "contact@lowvyn.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction",
          "websiteActivity"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "alarms",
    "notifications",
    "scripting"
  ],
  "host_permissions": [
    "https://api.lowvyn.com/*",
    "https://*.amazon.com/*",
    "https://*.amazon.co.uk/*",
    "https://*.amazon.ca/*",
    "https://*.amazon.de/*",
    "https://*.amazon.fr/*",
    "https://*.amazon.it/*",
    "https://*.amazon.es/*",
    "https://*.amazon.co.jp/*",
    "https://*.amazon.in/*",
    "https://*.amazon.sg/*",
    "https://*.amazon.com.au/*",
    "https://*.amazon.com.br/*",
    "https://*.amazon.com.mx/*",
    "https://*.amazon.ae/*",
    "https://*.amazon.nl/*",
    "https://*.amazon.se/*",
    "https://*.amazon.pl/*",
    "https://*.amazon.com.tr/*",
    "https://*.walmart.com/*",
    "https://*.walmart.ca/*",
    "https://*.walmart.com.mx/*",
    "https://*.bestbuy.com/*",
    "https://*.bestbuy.ca/*",
    "https://*.bbycastatic.ca/*"
  ],
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "action": {
    "default_popup": "popup/index.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.amazon.com/*",
        "https://*.amazon.co.uk/*",
        "https://*.amazon.ca/*",
        "https://*.amazon.de/*",
        "https://*.amazon.fr/*",
        "https://*.amazon.it/*",
        "https://*.amazon.es/*",
        "https://*.amazon.co.jp/*",
        "https://*.amazon.in/*",
        "https://*.amazon.sg/*",
        "https://*.amazon.com.au/*",
        "https://*.amazon.com.br/*",
        "https://*.amazon.com.mx/*",
        "https://*.amazon.ae/*",
        "https://*.amazon.nl/*",
        "https://*.amazon.se/*",
        "https://*.amazon.pl/*",
        "https://*.amazon.com.tr/*",
        "https://*.walmart.com/*",
        "https://*.walmart.ca/*",
        "https://*.walmart.com.mx/*",
        "https://*.bestbuy.com/*",
        "https://*.bestbuy.ca/*"
      ],
      "js": [
        "dist/amazon_helpers.js",
        "dist/walmart_helpers.js",
        "dist/bestbuy_helpers.js",
        "dist/affiliate.js",
        "dist/telemetry.js",
        "dist/content.js",
        "dist/alert_helpers.js",
        "dist/deal_overlay.js",
        "dist/cheaper_banner.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}