Examine source code of Chat Vivaintra

{
  "name": "Chat Vivaintra",
  "version": "1.0.4",
  "description": "Seja notificado(a) de novas mensagens no chat do Vivaintra.",
  "permissions": [
    "alarms",
    "storage",
    "unlimitedStorage",
    "https://*/*",
    "http://*/*"
  ],
  "background": {
    "scripts": [
      "src/socketClient.js",
      "socket.io_2.2.0.js",
      "src/manageStorage.js",
      "src/refresh.js",
      "src/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "ui/popup.html"
  },
  "icons": {
    "16": "media/icon/icon_16.png",
    "32": "media/icon/icon_32.png",
    "48": "media/icon/icon_48.png",
    "128": "media/icon/icon_128.png"
  },
  "manifest_version": 2
}