Playwright

Headless Chromium does not require GPU acceleration. This example uses Microsoft’s Playwright image to capture a screenshot and optionally run a persistent browser server for a host-side test runner or agent.

The Playwright image is large. Its first pull can take several minutes, while cached browser launches are much faster. Consider turning a prepared browser sandbox into a snapshot for repeated jobs.

Use Playwright

Capture a screenshot

msb run --name playwright-shot --replace \
  --cpus 2 --memory 2G --root-disk 4G \
  mcr.microsoft.com/playwright:v1.61.0-noble -- sh -lc '
    npx -y playwright@1.61.0 screenshot \
      --browser chromium \
      https://example.com \
      /root/example.png &&
    stat -c "%s bytes" /root/example.png
  '

msb run --name playwright-shot --replace `
  --cpus 2 --memory 2G --root-disk 4G `
  mcr.microsoft.com/playwright:v1.61.0-noble -- sh -lc '
    npx -y playwright@1.61.0 screenshot \
      --browser chromium \
      https://example.com \
      /root/example.png &&
    stat -c "%s bytes" /root/example.png
  '

Copy the artifact out of the stopped sandbox:

msb cp playwright-shot:/root/example.png ./example.png

The smoke test used for this example produced a valid 15,909-byte PNG. Rendering can vary slightly between releases and hosts, so verify the file rather than asserting an exact byte count.

Optional: run a remote server

msb run -d --name playwright-server --replace \
  --cpus 2 --memory 2G --root-disk 4G \
  -p 127.0.0.1:3000:3000 \
  mcr.microsoft.com/playwright:v1.61.0-noble -- sh -lc '
    exec npx -y playwright@1.61.0 run-server \
      --host 0.0.0.0 \
      --port 3000
  '

msb run -d --name playwright-server --replace `
  --cpus 2 --memory 2G --root-disk 4G `
  -p 127.0.0.1:3000:3000 `
  mcr.microsoft.com/playwright:v1.61.0-noble -- sh -lc '
    exec npx -y playwright@1.61.0 run-server \
      --host 0.0.0.0 \
      --port 3000
  '

Verify the forwarding path:

curl http://127.0.0.1:3000/

curl.exe http://127.0.0.1:3000/

The server returns Running and logs its WebSocket endpoint:

msb logs playwright-server

Connect a matching Playwright client to ws://127.0.0.1:3000/. Keep the client and server versions aligned.

The remote server has no application-level authentication. This example binds the host side to loopback intentionally. Do not publish it on 0.0.0.0 or an internet-facing interface without an authenticated proxy.

Clean up

Remove the sandboxes:

msb rm -f playwright-shot playwright-server

Delete the copied screenshot only if you no longer need it:

rm ./example.png

Remove-Item ./example.png

Reference

⌘I

Agents

CI/CD

Docker

Sandbox Workflows

Automation & Tooling

Data & Observability

Use Playwright

Reference

​Use Playwright

​Reference

Use Playwright

Reference