Examine source code of Marco8641

{
  "manifest_version": 2,
  "name": "Marco8641",
  "description": "Extention d'alerte quand Marco streamer!",
  "version": "1.0",
  "background": {
    "scripts": [
      "parameters.js",
      "btnlive.js",
      "firefox.js"
    ]
  },
  "permissions": [
    "https://api.twitch.tv/",
    "notifications"
  ],
  "browser_action": {
    "default_icon": "iconoff48.png"
  },
  "icons": {
    "16": "iconoff16.png",
    "48": "iconoff48.png",
    "128": "iconoff128.png"
  }
}