Examine source code of INSA Calcul

{
  "name": "INSA Calcul",
  "description": "A powerful and convenient calculator for your Chrome",
  "manifest_version": 2,
  "minimum_chrome_version": "23",
  "version": "2.4.5",
  "app": {
    "background": {
      "scripts": [
        "model.js",
        "view.js",
        "controller.js"
      ]
    }
  },
  "icons": {
    "16": "images/icon-16x16.png",
    "128": "images/icon-128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c20c4961-f854-4820-b189-53b113fb745a}"
    }
  }
}