diff --git a/ci/screenshot b/ci/screenshot
new file mode 100755
index 0000000..7b2acb5
--- /dev/null
+++ b/ci/screenshot
@@ -0,0 +1,3 @@
+#!/bin/sh -eu
+in=$1 out=$2 page0=${3:-} page1=${4:-$page0}
+google-chrome --disable-web-security --user-data-dir="./" --disable-background-networking --enable-features=NetworkService,NetworkServiceInProcess --disable-background-timer-throttling --disable-backgrounding-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-background-pages --disable-default-apps --disable-dev-shm-usage --disable-extensions --disable-features=TranslateUI,BlinkGenPropertyTrees,ImprovedCookieControls,SameSiteByDefaultCookies,LazyFrameLoading --disable-hang-monitor --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-backgrounding --disable-sync --force-color-profile=srgb --metrics-recording-only --no-first-run --enable-automation --password-store=basic --use-mock-keychain --headless --hide-scrollbars --mute-audio --blink-settings=primaryHoverType=2,availableHoverTypes=2,primaryPointerType=4,availablePointerTypes=4 --no-sandbox --no-startup-window --disable-gpu --run-all-compositor-stages-before-draw --no-pdf-header-footer --window-size=1024,576 --timeout=6000 --screenshot="$out" "$in"