Examine source code of Price Toolkit

{
  "manifest_version": 2,
  "name": "Price Toolkit",
  "version": "1.1",
  "description": "A lightweight extension offering a set of miscellaneous tools for managing and calculating prices. Perfect for quick price conversions, discounts, and tax calculations, all in one simple interface",
  "icons": {
    "72": "icons/bunnyprice.png"
  },
  "browser_action": {
    "default_title": "BunnyPrice",
    "default_popup": "src/page/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "src/background/jquery.slim.min.js",
        "src/background/ebayShipping.js",
        "src/background/amazonPriceConvert.js"
      ]
    }
  ],
  "background": {
    "scripts": []
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8ffa1d1b-b497-49d6-85d5-b418d29a3287}"
    }
  }
}