Examine source code of Extension Twitch DeBByii

{
  "manifest_version": 2,
  "name": "Extension Twitch DeBByii",
  "description": "Vous informe si DeBByii est en live",
  "version": "1.0",
  "permissions": [
    "https://*/*",
    "http://*/*",
    "tabs",
    "notifications",
    "https://www.twitch.tv/debbyii"
  ],
  "browser_action": {
    "default_popup": "index.html"
  },
  "icons": {
    "64": "IMG/APP.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}