Propagate to new format

firefox/Dockerfile

@@ -0,0 +1,18 @@
+# syntax = docker/dockerfile:1.2
+FROM myvnc/arch/base:i3
+USER root
+
+# Build ARG: use "root" for debugging
+ARG debug
+ 
+# Install packages
+RUN --mount=type=cache,sharing=locked,target=/var/cache/pacman \
+    pacman -Syu --ask 4 --needed \
+    firefox firefox-decentraleyes firefox-ublock-origin \
+    && pacman -Scc --ask 4
+
+# Tigervnc
+COPY *.sh /app/init.d/
+
+# Default environment
+USER ${debug:-user}