Disable Firefox Snap

In this example, we will disable the Firefox Snap package in Helios by using the system.sh build script for Ubuntu Noble.

Update noble/build/system.sh

To disable the Firefox Snap package, you can modify the noble/build/system.sh script to remove the apt snap preference for Firefox.

#!/bin/bash

set -e

export DEBIAN_FRONTEND=noninteractive

cat >/etc/apt/preferences.d/firefox-no-snap <<EOL
Package: firefox*
Pin: release o=Ubuntu*
Pin-Priority: -1
EOL

sed -i '/locale/d' /etc/dpkg/dpkg.cfg.d/excludes
apt update
apt upgrade -y
apt install -y gnupg curl wget
wget -q -O- https://packagecloud.io/dcommander/virtualgl/gpgkey |
    gpg --dearmor >/etc/apt/trusted.gpg.d/VirtualGL.gpg
echo "deb [signed-by=/etc/apt/trusted.gpg.d/VirtualGL.gpg] https://packagecloud.io/dcommander/virtualgl/any/ any main" >/etc/apt/sources.list.d/virtualgl.list
curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
apt update

...rest of the install commands...

This script creates a preference file that sets the priority of the Firefox Snap package to -1, effectively disabling it. The rest of the script remains unchanged, allowing you to continue installing other packages as needed.

Build the Image

To build the image with the modified system script, you can run the following command:

make noble

This command will build the Ubuntu Noble image with the Firefox Snap package disabled.