Examine source code of URL Visit Counter Tracker

{
  "manifest_version": 3,
  "name": "URL Tracker",
  "version": "1.0",
  "description": "Tracks and shows a badge count for repeated URL visits",
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_icon": "icons/icon.svg",
    "default_popup": "popup.html",
    "default_title": "URL Tracker - Manage Duplicate Tabs"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "url-tracker@balasurendaran.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}