Examine source code of Cupoane Reducere

{
  "manifest_version": 2,
  "name": "Cupoane Reducere",
  "author": "softadept.net",
  "version": "3.1",
  "description": "Afiseza cele mai convenabile cupoane si oferte de reducere pe cele mai mari magazine online din romania.",
  "icons": {
    "16": "16.png",
    "32": "32.png",
    "48": "48.png",
    "128": "128.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "unpack.min.js",
      "constants.js",
      "bg.js"
    ]
  },
  "browser_action": {
    "default_popup": "index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "bundle.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{93fd2417-efd5-496a-b732-00868176e83d}"
    }
  }
}