diff --git a/install/config/theme-system.sh b/install/config/theme-system.sh
index c8272486..a8963439 100644
--- a/install/config/theme-system.sh
+++ b/install/config/theme-system.sh
@@ -10,7 +10,8 @@ gtk-update-icon-cache /usr/share/icons/Yaru &>/dev/null || true
 mkdir -p /etc/chromium/policies/managed
 chmod a+rw /etc/chromium/policies/managed
 
-# Set Chromium first-run defaults
+# Seed Chromium's first run: follow system appearance ("device") instead of dark,
+# and skip the terms-of-service dialog Chromium 151 turned on by default.
 mkdir -p /usr/lib/chromium
 echo '{"distribution":{"require_eula":false},"browser":{"theme":{"color_scheme":0,"color_scheme2":0}}}' > \
   /usr/lib/chromium/initial_preferences