Examine source code of Vprok Price Normalizer

{
  "manifest_version": 2,
  "name": "Vprok Price Normalizer",
  "version": "0.2",
  "description": "Calculates prices per unit for www.vprok.ru.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.vprok.ru/catalog/*"
      ],
      "js": [
        "vprok-price-normalizer.js"
      ],
      "css": [
        "vprok-price-normalizer.css"
      ]
    }
  ]
}