Examine source code of Venngo Browser Extension

{
  "manifest_version": 2,
  "name": "Venngo Browser Extension",
  "homepage_url": "https://www.venngo.com/",
  "description": "Venngo Browser Extension",
  "default_locale": "en",
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "cookies",
    "storage",
    "alarms",
    "webNavigation",
    "https://*/",
    "http://*/"
  ],
  "content_security_policy": "default-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; connect-src https://rest.venngo.com  https://team.venngo.com/login  'unsafe-inline'; font-src 'self' https://fonts.gstatic.com; img-src  https://content.venngo.com",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "devtools_page": "devtools.html",
  "applications": {
    "gecko": {
      "id": "developer@venngo.com"
    }
  },
  "version": "2.0.1",
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "__MSG_extName__",
    "default_icon": {
      "19": "icons/19.png",
      "38": "icons/38.png"
    }
  }
}