Examine source code of MCRADIO

{
  "manifest_version": 2,
  "version": "1.0.1",
  "name": "MCRADIO",
  "browser_action": {
    "default_icon": "img/mcradio128.png",
    "default_title": "MCRADIO",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "img/mcradio16.png",
    "48": "img/mcradio48.png",
    "64": "img/mcradio64.png",
    "128": "img/mcradio128.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  }
}