Examine source code of I.T Communications Plugin

{
  "manifest_version": 2,
  "name": "I.T Communications Plugin",
  "version": "1.2.2",
  "description": "Telephony services in the browser",
  "homepage_url": "https://webphone-cl2.soft-switch-pbx.uk",
  "icons": {
    "48": "icons/active.png"
  },
  "permissions": [
    "privacy",
    "notifications",
    "contextMenus",
    "webRequest",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/active.png",
    "default_title": "I.T Communications",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/functions.js",
      "classes/SpeechpathPlugin.js",
      "classes/Pubnub.js",
      "classes/UserApi.js",
      "classes/Token.js",
      "classes/OAuth.js",
      "classes/BackgroundApp.js",
      "background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{57728911-3645-44d9-9b32-1618f780f498}"
    }
  }
}