Examine source code of sXstem Amazon

{
  "manifest_version": 2,
  "name": "sXstem Amazon",
  "description": "查询Amazon库存",
  "version": "1.0",
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*",
        "*://*.amazon.cn/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.de/*",
        "*://*.amazon.jp/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.in/*",
        "*://*.amazon.com.au/*",
        "*://*.amazon.it/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.es/*",
        "*://*.amazon.co.jp/*"
      ],
      "js": [
        "static/js/jquery-3.3.1.min.js",
        "static/js/stock.js"
      ],
      "css": [
        "static/css/iconfont.css",
        "static/css/common.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "stock.js"
  ],
  "permissions": [
    "*://*.amazon.com/*",
    "*://*.amazon.cn/*"
  ],
  "browser_action": {
    "default_icon": "static/img/48.png",
    "default_title": "亚马逊库存查询"
  },
  "icons": {
    "16": "static/img/16.png",
    "48": "static/img/48.png",
    "128": "static/img/128.png"
  }
}