Bash script to switch from Firefox Snap package to the Debian APT package from Mozilla.

firefox-snap-apt.sh

#!/bin/bash

# Script to switch Firefox from Snap to Debian package from Mozilla repository
#
# Based on the Ansible playbook found here: https://www.hackitu.de/firefox_snap_apt/

# Ensure the script is run as root
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root"
   exit 1
fi

# Function to remove Snap package
# This function removes the Firefox Snap package if it exists
remove_snap_package() {
  snap remove firefox
}

# Function to get and add Mozilla repository key
# This function downloads the Mozilla repository signing key and adds it to the trusted keys
add_mozilla_repo_key() {
  wget -O /etc/apt/trusted.gpg.d/mozilla.asc https://packages.mozilla.org/apt/repo-signing-key.gpg
  chown root:root /etc/apt/trusted.gpg.d/mozilla.asc
  chmod 0644 /etc/apt/trusted.gpg.d/mozilla.asc
}

# Function to add Mozilla repository
# This function adds the Mozilla repository to the APT sources list and updates the package list
add_mozilla_repository() {
  echo "deb [signed-by=/etc/apt/trusted.gpg.d/mozilla.asc] https://packages.mozilla.org/apt mozilla main" | tee /etc/apt/sources.list.d/mozilla.list
  apt-get update
}

# Function to pin Mozilla packages
# This function sets the APT pinning priority for packages from the Mozilla repository
pin_mozilla_packages() {
  cat <<EOF > /etc/apt/preferences.d/mozilla
Package: *
Pin: origin packages.mozilla.org
Pin-Priority: 1000
EOF
  chown root:root /etc/apt/preferences.d/mozilla
  chmod 0644 /etc/apt/preferences.d/mozilla
}

# Function to install Firefox from Debian package
# This function installs Firefox from the Debian package provided by the Mozilla repository
install_firefox() {
  apt-get install -y firefox
}

# Execute functions in the proper order
remove_snap_package
add_mozilla_repo_key
add_mozilla_repository
pin_mozilla_packages
install_firefox

# Print completion message
echo "Firefox has been switched from Snap to Debian package from Mozilla repository."