Examine source code of Rocketbot Recorder

{
  "name": "Rocketbot Recorder",
  "description": "Graba clicks y textos",
  "version": "3.0.2",
  "manifest_version": 2,
  "author": "Danilo Toro - José González",
  "browser_action": {
    "default_icon": "img/iso.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "downloads",
    "storage",
    "tabs",
    "http://*/",
    "https://*/"
  ]
}