Chrome DevTools MCP 0.21 ships memory-le…

CHROME-DEVTOOLS-MCP PUB_DATE: 2026.04.02

CHROME DEVTOOLS MCP 0.21 SHIPS MEMORY-LEAK DETECTION AND STEADIER AGENT AUTOMATION

Chrome DevTools MCP 0.21 adds memory leak detection and stability fixes for agent-driven browser automation. The [chrome-devtools-mcp](https://github.com/Chrom...

Chrome DevTools MCP 0.21 adds memory leak detection and stability fixes for agent-driven browser automation.

The chrome-devtools-mcp project lets coding agents control a live Chrome with DevTools and Puppeteer. The new v0.21.0 release adds a memory-leak detection skill using take_memory_snapshot, improves page lifecycle handling, and fixes CLI isolation when userDataDir is set.

It also marks Lighthouse and memory as non-read-only, records client name in telemetry, versions the Claude Code plugin, and changes config to wrap .mcp.json under mcpServers. If you ship via the ChatGPT Apps SDK, beware two forum-reported quirks: template/widget changes not appearing after MCP redeploy thread and a first-call tool param-name mismatch thread.

[ WHY_IT_MATTERS ]

01.

Teams can now programmatically spot memory leaks and gather DevTools traces in CI-like agent workflows.

02.

Release hardens automation flows and clarifies config/telemetry, reducing flaky browser sessions and integration surprises.

[ WHAT_TO_TEST ]

terminal
Run the new memory snapshot skill on a heavy SPA flow; compare heap growth across steps to confirm leak detection signal.
terminal
In a ChatGPT App, redeploy your MCP server and verify UI template changes and first-call tool parameter binding.

[ BROWNFIELD_PERSPECTIVE ]

Legacy codebase integration strategies...

01.
Adopt the MCP server alongside existing Puppeteer scripts to capture traces and memory snapshots for flaky or slow user journeys.
02.
Update .mcp.json to wrap config under mcpServers and verify sessions when providing userDataDir now that isolation defaults changed.

[ GREENFIELD_PERSPECTIVE ]

Fresh architecture paradigms...

01.
Design agents to gate merges with DevTools traces, Lighthouse runs, and memory snapshots on Chrome for Testing.
02.
Model tools with explicit parameters and idempotent actions to absorb first-call quirks documented in ChatGPT Apps SDK threads.

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