Examine source code of Webpage-Tracker

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Leads-Tracker",
  "action": {
    "default_popup": "index.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd7420a7-be7f-4c9d-876b-00aee1d6d147}"
    }
  }
}