Examine source code of SION Zeiterfassung

{
  "background": {
    "scripts": [
      "app/background.js"
    ]
  },
  "browser_action": {
    "default_popup": "app/index.html",
    "default_title": "__MSG_extName__"
  },
  "description": "__MSG_extDesc__",
  "icons": {
    "16": "app/img/images/icon.png",
    "32": "app/img/images/icon.png",
    "128": "app/img/images/icon.png"
  },
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "permissions": [
    "storage",
    "unlimitedStorage",
    "alarms",
    "https://*.sion-hub.com/"
  ],
  "default_locale": "de",
  "short_name": "Time Tracker",
  "version": "1.0.2",
  "applications": {
    "gecko": {
      "id": "admin@sion-hub.com"
    }
  }
}