Examine source code of Personalized Encryptor

{
  "manifest_version": 2,
  "name": "Encryptor",
  "version": "1.7resigned1",
  "author": "Rishiraj Surti",
  "description": "Personalized text encryptor and password generator",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "permissions": [
    "storage"
  ],
  "applications": {
    "gecko": {
      "id": "{beaf5442-31ad-472c-9a58-dad4575c8e9e}",
      "strict_min_version": "42.0"
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "96": "icons/icon96.png"
    },
    "default_title": "Encryptor",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "./js/encryptor.js",
      "./js/bootstrap.min.js",
      "./js/jquery-2.2.4.min.js"
    ]
  }
}