Examine source code of FlipHero - Flipping Superpower

{
  "manifest_version": 3,
  "name": "FlipHero - Your Flipping Superpower",
  "version": "3.0.0",
  "description": "Extract products from Amazon, eBay, Walmart & more. Auto-fill Facebook Marketplace in 30 seconds. The hero resellers deserve! 🦸‍♂️",
  "browser_specific_settings": {
    "gecko": {
      "id": "fliphero@fliphero.io",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "downloads",
    "cookies",
    "scripting"
  ],
  "host_permissions": [
    "https://www.amazon.com/*",
    "https://www.ebay.com/*",
    "https://www.walmart.com/*",
    "https://www.bestbuy.com/*",
    "https://www.target.com/*",
    "https://www.aliexpress.com/*",
    "https://www.aliexpress.us/*",
    "https://*.alibaba.com/*",
    "https://www.temu.com/*",
    "https://www.facebook.com/*",
    "https://fliphero.io/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.com/*/dp/*",
        "https://www.amazon.com/dp/*",
        "https://www.ebay.com/itm/*",
        "https://www.walmart.com/ip/*",
        "https://www.bestbuy.com/site/*",
        "https://www.bestbuy.com/product/*",
        "https://www.target.com/p/*",
        "https://www.aliexpress.com/item/*",
        "https://www.aliexpress.us/item/*",
        "https://*.alibaba.com/product-detail/*",
        "https://www.temu.com/goods.html*"
      ],
      "js": [
        "content-scripts/universal-extractor.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.facebook.com/marketplace/create/*"
      ],
      "js": [
        "content-scripts/facebook-autofill.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}