Unable to resolve resource extension:mcp.config.usrlocal.chromedevtools/chrome-devtools-mcp/mcpServer

[CaiqueCoelho]

Describe the bug
Unable to resolve resource extension:mcp.config.usrlocal.chromedevtools/chrome-devtools-mcp/mcpServer

To Reproduce
Steps to reproduce the behavior:

1. I've installed the Chrome Devtools MCP
2. I've tried to add the tool as context in the Agent chat

Expected behavior
I should be able to chat in agent mode using the Devrools MCP

Chrome version: Version 141.0.7390.54 (Official Build) (arm64)
Coding agent version: Visual Studio Code 1.104.2
Model version: Claude Sonnet 3.5

Screenshots

Chat log

[error] [Janela] Ocorreu um erro desconhecido. Verifique o log para obter detalhes.
2025-10-07 12:02:35.295 [error] [Janela] Error: Unable to resolve resource extension:mcp.config.usrlocal.chromedevtools/chrome-devtools-mcp/mcpServer
    at YKe.r (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:1226:21649)
    at YKe.r (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:1226:21635)
    at async pTt.acquire (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:27:3195)
    at async ZKe.createModelReference (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:1226:22967)
    at async YP.resolve (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:534:15386)
    at async mve.setInput (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:605:80098)
    at async PGe.S (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:610:58577)
    at async PGe.L (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:610:57132)
    at async PGe.openEditor (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:610:56214)
    at async vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:722:23355

[sebastianbenz]

How did you install the MCP server? Can you show your JSON MCP config?

[CaiqueCoelho]

Hey @sebastianbenz I've installed from https://github.com/mcp this is my JSON config:

"chromedevtools/chrome-devtools-mcp": {
			"type": "stdio",
			"command": "npx",
			"args": [
				"chrome-devtools-mcp@latest",
				"--browserUrl",
				"${input:browser_url}",
				"--headless",
				"${input:headless}",
				"--isolated",
				"${input:isolated}",
				"--channel",
				"${input:chrome_channel}"
			],
			"gallery": "https://api.mcp.github.com/v0/servers/13749964-2447-4c31-bcab-32731cced504",
			"version": "0.0.1-seed"
		}

[sebastianbenz]

Thanks! That helps! If you remove the following it should work:

"--browserUrl",
				"${input:browser_url}",
				"--headless",
				"${input:headless}",
				"--isolated",
				"${input:isolated}",
				"--channel",
				"${input:chrome_channel}"

[sebastianbenz]

This should also have been fixe by #298

[CaiqueCoelho]

@sebastianbenz thanks for the help, but even removing those args I'm still getting the same error

2025-10-09 20:17:19.960 [error] [Janela] Unable to resolve resource extension:mcp.config.usrlocal.chromedevtools/chrome-devtools-mcp/mcpServer: Error: Unable to resolve resource extension:mcp.config.usrlocal.chromedevtools/chrome-devtools-mcp/mcpServer

Some extra logs:

at YKe.r (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:1226:21649)
    at YKe.r (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:1226:21635)
    at async pTt.acquire (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:27:3195)
    at async ZKe.createModelReference (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:1226:22967)
    at async YP.resolve (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:534:15386)
    at async mve.setInput (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:605:80098)
    at async PGe.S (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:610:58577)
    at async PGe.L (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:610:57132)
    at async PGe.openEditor (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:610:56214)
    at async vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:722:23355