Examine source code of Top2Twitch

{
  "manifest_version": 2,
  "name": "Top2Twitch",
  "description": "Ne loupez plus un seul live de la chaîne Twitch top2tinidrum",
  "version": "2.1.1",
  "author": "Gwyomarch",
  "permissions": [
    "notifications"
  ],
  "icons": {
    "64": "img/logo_64.png",
    "128": "img/logo_128.png",
    "256": "img/logo_256.png"
  },
  "browser_action": {
    "default_icon": "img/icon.png",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "js/jquery.js",
      "js/config.js",
      "js/background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff547782-7cd1-4312-aeaa-14477d9e6346}"
    }
  }
}