Examine source code of PkcsApp

{
  "description": "Pkcs Id card comunication plugin",
  "manifest_version": 2,
  "name": "PkcsApp",
  "version": "0.2resigned1",
  "icons": {
    "48": "icons/ico.svg"
  },
  "applications": {
    "gecko": {
      "id": "lukaskiss222@gmail.com",
      "strict_min_version": "50.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/ico.svg",
    "default_title": "PkcsApp",
    "default_popup": "popup/choose.html"
  },
  "web_accessible_resources": [
    "jquery-3.3.1.min.js",
    "window"
  ],
  "permissions": [
    "nativeMessaging",
    "activeTab"
  ]
}