Fix Playwright MCP on Claude Code

The Playwright MCP is particularly interesting for an agent like Claude Code, as it is significantly more flexible than using the Playwright library via JavaScript for browser interactions. The issue is that it defaults to Google Chrome, which isn’t available on platforms like Linux/arm64 (e.g. a Linux VM running on Apple Silicon):

Error: browserType.launchPersistentContext: Chromium distribution 'chrome' is not found at /opt/google/chrome/chrome
Run "npx playwright install chrome"
(...)
ERROR: not supported on Linux Arm64
Failed to install browsers
Error: Failed to install chrome

The fix is simple. You can either ask Claude Code itself to modify its ~/.claude.json file or edit it directly, switching to Chromium by appending the --browser chromium argument to the mcpServers setting, like:

"mcpServers": {
  "playwright": {
    "type": "stdio",
    "command": "npx",
    "args": [
      "@playwright/mcp@latest",
      "--browser",
      "chromium"
    ],
    "env": {}
  }
},