Examine source code of SellerFast

{
  "icons": {
    "16": "icon16.plasmo.e7bcd3ac.png",
    "32": "icon32.plasmo.ce39377b.png",
    "48": "icon48.plasmo.3c17e113.png",
    "64": "icon64.plasmo.df317abe.png",
    "128": "icon128.plasmo.6a4310c5.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icon16.plasmo.e7bcd3ac.png",
      "32": "icon32.plasmo.ce39377b.png",
      "48": "icon48.plasmo.3c17e113.png",
      "64": "icon64.plasmo.df317abe.png",
      "128": "icon128.plasmo.6a4310c5.png"
    },
    "default_popup": "popup.html"
  },
  "version": "0.1.0",
  "name": "SellerFast",
  "description": "Cross-border seller daily ops toolkit - price tracker, review analyzer, listing translator",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.com/*/dp/*",
        "https://www.amazon.com/dp/*",
        "https://www.amazon.co.jp/*/dp/*",
        "https://www.amazon.co.jp/dp/*",
        "https://www.amazon.co.uk/*/dp/*",
        "https://www.amazon.co.uk/dp/*",
        "https://www.amazon.de/*/dp/*",
        "https://www.amazon.de/dp/*",
        "https://shopee.com/*-i.*",
        "https://shopee.tw/*-i.*"
      ],
      "js": [
        "amazon-product.9bc032b5.js"
      ],
      "css": []
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sellerfast@dotanero9.github.io",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}