Examine source code of Opera Speed Dial Stable

{
  "manifest_version": 2,
  "name": "Opera Speed Dial Stable",
  "version": "1.5",
  "description": "Stable grid with search and drag-n-drop",
  "permissions": [
    "storage",
    "clipboardRead"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "opera-dial-stable@local",
      "strict_min_version": "91.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}