Examine source code of Tab Group Timeline

{
  "manifest_version": 3,
  "name": "Tab Group Timeline",
  "version": "1.0.0",
  "description": "Group your open tabs by the time they were created to recall work sessions easily.",
  "action": {
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f520e38f-36af-42c4-826d-c6ca8e41f2a3}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}