diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index c7002862..2b155d9d 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -6,6 +6,15 @@ COPY --from=deno /deno /usr/local/bin/deno
 RUN apt-get update \
   && apt-get install -y --no-install-recommends ffmpeg \
   && rm -rf /var/lib/apt/lists/*
+# Playwright's Firefox and Chromium headless shell, with the system libraries
+# they need, for screenshots of the dev instances (`npm:playwright@1.63.0`): a
+# script importing another version looks for other builds. They live outside
+# the home directory, which a rebuild would otherwise leave without them.
+ENV PLAYWRIGHT_BROWSERS_PATH=/opt/ms-playwright
+RUN DENO_DIR=/tmp/deno deno run --no-lock -A npm:playwright@1.63.0 install \
+    --with-deps firefox chromium-headless-shell \
+  && chmod -R a+rX /opt/ms-playwright \
+  && rm -rf /tmp/deno /var/lib/apt/lists/*
 # The services share Deno's cache through a volume (compose.yaml), which Docker
 # creates owned as this directory is, so it must exist and be node's.
 RUN mkdir -p /home/node/.cache/deno && chown -R node:node /home/node/.cache