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chrome-devtools-mcp-v1.2.0

punkpeye/fastmcpchrome-devtools-mcp-v1.2.0Jun 8, 2026by browser-automation-bot

AI Summary

This release significantly expands Chrome DevTools capabilities by adding experimental TOON support, new memory debugging tools, and heap snapshot management. It also improves performance through concurrent Lighthouse file saving and refactors internal logging and validation processes.

Key Highlights

  • Experimental TOON support for structured content output
  • New close_heapsnapshot MCP tool
  • Memory debugging tools implementation
  • Concurrent Lighthouse file saving
  • Extension service worker logs

New Features

  • Experimental TOON support
  • close_heapsnapshot MCP tool
  • Memory debugging tools
  • Third-party developer tools provider support
  • Extension service worker logs
  • Allowed/blocked URL pattern options

Full Release Notes

## [1.2.0](https://github.com/ChromeDevTools/chrome-devtools-mcp/compare/chrome-devtools-mcp-v1.1.1...chrome-devtools-mcp-v1.2.0) (2026-06-08)


### 🎉 Features

* add experimental TOON support for structured content output ([#2042](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2042)) ([aa33bff](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/aa33bff19fcbf87949eec152c4b49d74e0a9330d))
* Adds close_heapsnapshot MCP tool ([#2174](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2174)) ([8713b93](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/8713b93b41ce301acf0ebc555c9a1b25d29bc526))
* Handle multiple providers of third-party developer tools ([#2168](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2168)) ([30d59a7](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/30d59a78727c31ec9d70d2bd6d9310e78f1888b3))
* implement extension service worker logs ([#1915](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/1915)) ([29e3898](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/29e389848fd0cae1116620d44fbce508b4404137))
* memory debugging tools ([#2169](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2169)) ([0217397](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/02173972574241049885171c5a6fc0ba998a20cc))
* support allowedUrlPattern & blockedUrlPattern Options ([#2037](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2037)) ([02b4492](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/02b4492ca605755f67f016ee1de98aa1f506168c))


### 🛠️ Fixes

* Cursor plugin homepage setting field ([#2173](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2173)) ([8971890](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/89718901174be7c0c58a1a2b29281ab2f053cd53))


### 📄 Documentation

* **skill:** guide agent to prompt for --categoryExtensions  ([#2189](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2189)) ([8b458f7](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/8b458f7ad194b52305b831d5bfd6c0b6f5a53376))


### ⚡ Performance

* lighthouse file saves to run concurrently ([#2178](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2178)) ([f90f863](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/f90f863d4b9d643ab880c9dc8cdd78b6c88ae38d))


### 🏗️ Refactor

* change type of logger ([#2165](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2165)) ([bf0574d](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/bf0574da8ce0986beb5dd2f026a2332a7e63b791))
* use validate files on the tool level ([#2152](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2152)) ([2e039c0](https://github.com/ChromeDevTools/chrome-devtools-mcp/commit/2e039c09e1a273581d9b51081a0feb8a57791947)), closes [#2150](https://github.com/ChromeDevTools/chrome-devtools-mcp/issues/2150)