chrome-devtools-mcp v1.9.0 adds configurable filesystem roots and a switch to turn off JavaScript execution entirely

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Released 2026-09-08, v1.9.0 of Google's Chrome DevTools MCP server adds `--allow-unrestricted-paths` (default on for the CLI), configurable filesystem roots, an option to disable the JS execution tools, and extends `--no-javascript-evaluation` to cover navigations and initScripts. It also ships an Agent Plugins 1.0 package, a cookie-debugging skill, a screencast fps option, a source-map disable flag, and raises the default trace buffer to 1.2GB to match DevTools. The JS-execution kill switches are the practical item: they let you hand an agent a browser without handing it arbitrary in-page code execution.