Examine source code of Repcentral Extension

{
  "manifest_version": 2,
  "name": "Repcentral Extension",
  "version": "2.0",
  "description": "Automatically convert links on Reddit and Yupoo to your favorite shopping agent and enrich the page with online information, QC pictures, and more.",
  "permissions": [
    "storage",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "admin@ownage.tech"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.reddit.com/*",
        "https://www.yupoo.com/*",
        "https://weidian.com/*",
        "https://taobao.com/*",
        "https://*.x.yupoo.com/*",
        "https://1688.com/*"
      ],
      "js": [
        "content.js"
      ]
    },
    {
      "matches": [
        "https://www.kakobuy.com/item/details*",
        "https://kakobuy.com/item/details*"
      ],
      "js": [
        "kakoQC.js"
      ]
    }
  ]
}