Examine source code of Startpage query as title

{
  "manifest_version": 3,
  "name": "Startpage query as title",
  "version": "1.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "@startpage-rename-tab",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "description": "Changes the tab title on Startpage to show your search query.",
  "content_scripts": [
    {
      "matches": [
        "*://www.startpage.com/*"
      ],
      "js": [
        "startpage-rename-tab.js"
      ],
      "run_at": "document_idle"
    }
  ]
}