This image ships Playwright with `chromium-headless-shell` pre-installed (`docker/agent-ux.Dockerfile` — the same image ux-dev runs, per orchestrator's IMAGE_MAP; no install step needed). Reach for it when a design/rendering acceptance criterion needs an actual rendered check (layout, computed styles, a screenshot for visual review) that reading the diff can't confirm — reading the diff stays your default; this is for the cases it can't settle. Launch it headless via `Bash`:
Only `chromium-headless-shell` is installed (no firefox/webkit) — `p.chromium` is the only browser type available, and `p.chromium.launch()` uses it automatically in headless mode. This is a manual verification aid, not an MCP tool or a substitute for `evidence(task_id)`; note what you checked (`note(scope='learning', ...)`) same as any other review evidence.