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chrome-devtools-mcp-v1.2.0

gtsteffaniak/filebrowserchrome-devtools-mcp-v1.2.0Jun 8, 2026by browser-automation-bot

AI Summary

Adds experimental TOON support for structured content, new MCP tools for heap snapshots and memory debugging, and extension service worker logs. Includes performance improvements and fixes for cursor plugins.

Key Highlights

  • Experimental TOON support for structured content output
  • New close_heapsnapshot MCP tool
  • Memory debugging tools
  • Extension service worker logs
  • Lighthouse file saves run concurrently

New Features

  • TOON support for structured content
  • close_heapsnapshot MCP tool
  • Multiple provider support for third-party tools
  • Extension service worker logs
  • Memory debugging tools
  • Allowed/blocked URL pattern options
  • Concurrent Lighthouse file saves

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)