vscode-plugin-recent-files/.vscode/launch.json

// A launch configuration that launches the extension inside a new window
{
    "version": "0.1.0",
    "configurations": [
        {
            "name": "Launch Extension",
            "type": "extensionHost",
            "request": "launch",
            "runtimeExecutable": "${execPath}",
            "args": ["--extensionDevelopmentPath=${workspaceRoot}" ],
            "stopOnEntry": false
        },
        {
            "name": "Launch Tests",
            "type": "extensionHost",
            "request": "launch",
            "runtimeExecutable": "${execPath}",
            "args": ["--extensionDevelopmentPath=${workspaceRoot}", "--extensionTestsPath=${workspaceRoot}/test" ],
            "stopOnEntry": false
        }
    ]
}