Examine source code of tabStats

{
  "manifest_version": 2,
  "name": "tabStats",
  "version": "1.4.2",
  "description": "Stats on Tabs and Tab Groups.",
  "author": "Rhialto",
  "permissions": [
    "tabs",
    "tabGroups",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a8fc0478-c583-4ead-95cf-6f7b7c3902ad}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}