diff --git a/docker/kasm/Dockerfile b/docker/kasm/Dockerfile
index 9659311b5f96d7673ed092364ea022ed2072453a..69bcf1766e24a4eb1b03a517c1f066af9e0104cc 100644
--- a/docker/kasm/Dockerfile
+++ b/docker/kasm/Dockerfile
@@ -14,14 +14,7 @@ ARG ANACONDA_VERS=Anaconda3-2024.02-1
 ARG KASM_USER
 
 
-RUN cat <<EOF > /etc/apt/preferences.d/firefox-deb-nosnap
-Package: firefox*
-Pin: release o=Ubuntu*
-Pin-Priority: -1
-Package: *
-Pin: origin ppa.launchpadcontent.net
-Pin-Priority: 1000
-EOF
+COPY firefox-deb-nosnap /etc/apt/preferences.d/firefox-deb-nosnap
 
 RUN sudo add-apt-repository ppa:mozillateam/ppa
 RUN apt-get update && \
diff --git a/docker/kasm/firefox-deb-nosnap b/docker/kasm/firefox-deb-nosnap
new file mode 100644
index 0000000000000000000000000000000000000000..289d28cd265be642c4113bad27b7819164b41a0c
--- /dev/null
+++ b/docker/kasm/firefox-deb-nosnap
@@ -0,0 +1,6 @@
+Package: firefox*
+Pin: release o=Ubuntu*
+Pin-Priority: -1
+Package: *
+Pin: origin ppa.launchpadcontent.net
+Pin-Priority: 1000