{
  "slug": "chrome-devtools-mcp-new-page-supports-isolated-browser-contexts-85e24abf1ca1",
  "title": "chrome-devtools-mcp new_page supports isolated browser contexts",
  "tools": [
    "chrome-devtools-mcp"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-02-25T06:57:30.000Z",
  "announced_at": "2026-02-25T06:57:30.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "For multi-user browser testing that needs separate storage, call `new_page` with a distinct `isolatedContext` name for each user; pages with the same name share cookies and storage, while different names are isolated.",
    "examples": [
      "new_page({\"url\":\"<page URL>\",\"isolatedContext\":\"<user context name>\"})"
    ],
    "gotchas": [
      "Version: 0.18.0",
      "url (required): URL to load in the new page.",
      "isolatedContext: Context name; pages with the same name share cookies and storage, while pages in different browser contexts are fully isolated.",
      "The `isolatedContext` parameter is optional.",
      "Omitting it uses the default browser context; existing behavior is unchanged."
    ]
  },
  "why_it_matters": "When testing multi-user browser behavior such as chat or collaborative editing, create pages in named isolated contexts to separate their storage.",
  "before": "Create pages in the default browser context, where pages share cookies and storage.",
  "sources": [
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/releases/tag/chrome-devtools-mcp-v0.18.0",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/991",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/blob/59f6477a70eb07585e9a510089f1dfc840a012fd/docs/tool-reference.md"
  ],
  "rank": 0.96031,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v1+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "ghtools-20261008",
    "verdict_id": "ghtools-20261008:ghtools-20261008-210ebd676b9d5d8d-4:gate",
    "evidence_hash": "602c00b324f7e66839d16778d091c262c4ee70e978047a91d5991c04e5cd2691"
  },
  "review": {
    "draft_hash": "69ac723b91b71ee513d636c05866df2c953e8bd443633763e508beaa5ad53766",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "ghtools-20261008:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.96 >= 0.9; 2 needed) and Jev gave 0.81 (>= 0.6 needed)."
  }
}