diff --git a/src/bookworm b/src/bookworm
deleted file mode 100755
index 07d4b87..0000000
--- a/src/bookworm
+++ /dev/null
@@ -1,291 +0,0 @@
-#!/bin/bash
-
-## FUNCTIONS
-## ---------
-
-function trap_error() {
-    error_code=$1
-    error_line=$2
-
-    printf "\nEXIT #${error_code} due to error at line ${error_line} : \n-----------------------------------------\n"
-    sed "${error_line}q;d" $0
-    echo
-    exit $error_code
-}
-
-function runVoid() {
-    trap - ERR
-    local COMMAND="$@"
-    bash -c "${COMMAND}" >/dev/null 2>&1
-    runVoidError=$?
-    trap 'trap_error $? $LINENO' ERR
-}
-
-function askConfirmation() {
-    case "$1" in
-    y | Y | yes | YES)
-        QUESTION="(Y/n)?"
-        DEFAULT=0
-        ;;
-    *)
-        QUESTION="(y/N)?"
-        DEFAULT=1
-        ;;
-    esac
-    read -p "$QUESTION : " choice
-    case "$choice" in
-    y | Y | yes | YES) return 0 ;; #true
-    n | no | N | NO) return 1 ;;   #false
-    *) return $DEFAULT ;;
-    esac
-}
-
-# Variables and constants
-## ---------
-
-BASEDIR=/opt/debian-gnome
-ALLOWED_USERS=$(id -un) #CUSTOMIZE if needed!
-REQUIRED_PACKAGES=(
-    bash-completion
-    vim git wget curl
-    htop jq unzip
-	python3-pip
-	gir1.2-gtop-2.0 gir1.2-nm-1.0 gir1.2-clutter-1.0 gnome-system-monitor
-    tilix wl-clipboard 
-    nextcloud-desktop nautilus-nextcloud nautilus-share nautilus-image-converter
-    cups hplip
-    ttf-mscorefonts-installer
-)
-
-## MAIN
-## ---------
-
-[ $(id -u) -eq 0 ] && echo 'normal user required' && exit -1
-
-echo "# configure apt sources to the mithril's"
-echo "========================================"
-if grep cdrom /etc/apt/sources.list; then
-    echo "deb http://debian.mithril.re/debian bookworm main contrib non-free-firmware" | sudo tee /etc/apt/sources.list
-    echo "deb http://debian.mithril.re/debian bookworm-updates main contrib non-free-firmware" | sudo tee -a /etc/apt/sources.list
-    echo "deb http://debian.mithril.re/debian-security bookworm-security main contrib non-free-firmware" | sudo tee -a /etc/apt/sources.list
-    sudo apt update
-    sudo apt autoremove -y
-else
-    echo "# updating repositories"
-    echo "==================="
-    if [[ $(date --date='-12 hours' +%s) -gt $(date -d "$(stat -c %y /var/lib/apt/lists/partial)" +%s) ]]; then
-        sudo apt update
-        sudo apt autoremove -y
-    else
-        echo "repositories recently updated!"
-    fi
-fi
-
-
-
-echo "# required packages"
-echo "==================="
-for package in ${REQUIRED_PACKAGES[@]}; do
-    runVoid dpkg-query --status $package
-    if [ $runVoidError -ne 0 ]; then
-        echo -n "installing package <$package> ... "
-        sudo DEBIAN_FRONTEND=noninteractive apt install -y $package
-        echo "DONE"
-    fi
-done
-
-echo "## debian-bash"
-echo "=============="
-if [[ ! -d /opt/debian-bash ]]; then
-    curl https://git.artcode.re/pvincent/debian-bash/raw/branch/master/install.sh | sudo bash -s -- --host
-else
-    echo "debian-bash already installed!"
-fi
-
-echo "## openssh-server"
-echo "================="
-PGKNAME='openssh-server'
-runVoid dpkg-query --status $PGKNAME
-if [ $runVoidError -ne 0 ]; then
-    set -e
-    sudo apt install -y $PGKNAME
-    sudo /opt/debian-bash/tools/append_or_replace "^#\?PermitRootLogin.*$" "PermitRootLogin no" /etc/ssh/sshd_config
-    sudo /opt/debian-bash/tools/append_or_replace "^#\?PasswordAuthentication.*$" "PasswordAuthentication no" /etc/ssh/sshd_config
-    sudo /opt/debian-bash/tools/append_or_replace "^#\?AllowUsers.*$" "AllowUsers $ALLOWED_USERS" /etc/ssh/sshd_config
-    sudo systemctl restart sshd
-    set +e
-else
-    echo "${PGKNAME} already installed!"
-fi
-
-
-firefox_lang=$(echo $LANG | cut -d_ -f1)
-[[ $firefox_lang == "en" ]] && firefox_lang="en-US"
-echo $firefox_lang
-
-
-echo "## firefox latest"
-echo "================="
-if [[ ! /usr/local/bin/firefox -ef /opt/firefox/firefox ]]; then
-    set -e
-    cd /tmp
-    wget $(curl "https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=$firefox_lang" | cut -d '"' -f2) -O firefox-latest.tar.bz2
-    sudo mkdir /opt/firefox -p
-    sudo chown $USER /opt/firefox
-    tar -xjf firefox-latest.tar.bz2 -C /opt
-    cat <<EOF | sudo tee -a /usr/share/applications/firefox-stable.desktop
-[Desktop Entry]
-Name=Firefox Stable
-Comment=Web Browser
-Exec=/opt/firefox/firefox %u
-Terminal=false
-Type=Application
-Icon=/opt/firefox/browser/chrome/icons/default/default128.png
-Categories=Network;WebBrowser;
-MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/vnd.mozilla.xul+xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;
-StartupNotify=true
-StartupWMClass=Navigator
-Actions=new-window;new-private-window;profile-manager;
-
-[Desktop Action new-window]
-Name=New Window
-Exec=/opt/firefox/firefox --new-window %u
-
-[Desktop Action new-private-window]
-Name=New Private Window
-Exec=/opt/firefox/firefox --private-window %u
-
-[Desktop Action profile-manager]
-Name=Profile Manager
-Exec=/opt/firefox/firefox -P %u
-EOF
-    sudo ln -s /opt/firefox/firefox /usr/local/bin/firefox
-    sudo update-alternatives --install /usr/bin/x-www-browser x-www-browser /opt/firefox/firefox 200 && sudo update-alternatives --set x-www-browser /opt/firefox/firefox
-    sudo apt remove -y firefox-esr
-    sudo apt install -y libdbus-glib-1-2
-    set +e
-else
-    echo "firefox latest already installed!"
-fi
-
-echo "## firefox by default"
-echo "====================="
-xdg-settings set default-web-browser firefox-stable.desktop
-
-
-echo "## gnome default settings"
-echo "============="
-gsettings set org.gnome.nautilus.preferences click-policy 'single'
-gsettings set org.gnome.mutter dynamic-workspaces false
-gsettings set org.gnome.desktop.wm.preferences num-workspaces 1
-gsettings set org.gnome.desktop.peripherals.touchpad tap-to-click true
-
-
-echo "## favorite apps"
-echo "================"
-favorite_apps=$(gsettings get org.gnome.shell favorite-apps)
-if [[ "$favorite_apps" == "['firefox-esr.desktop', 'org.gnome.Evolution.desktop', 'rhythmbox.desktop', 'libreoffice-writer.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'yelp.desktop']" ]]; then
-    gsettings set org.gnome.shell favorite-apps "['org.gnome.Nautilus.desktop','firefox-stable.desktop','org.gnome.Software.desktop']"
-fi
-
-
-echo "## gnome-extensions-cli"
-echo "======================="
-if [[ ! -f ~/.local/bin/gext ]]; then
-    pip install gnome-extensions-cli --break-system-packages
-else
-    echo "gnome-extensions-cli already installed!"
-fi
-
-echo "## gnome-shell install several extensions"
-echo "========================================="
-EXTENSIONS=(
-    "appindicatorsupport@rgcjonas.gmail.com"
-    "system-monitor-next@paradoxxx.zero.gmail.com"
-    "dash-to-dock@micxgx.gmail.com"
-    "gsconnect@andyholmes.github.io"
-    "network-stats@gnome.noroadsleft.xyz"
-)
-
-for extension in "${EXTENSIONS[@]}"; do
-    if [[ ! -d $HOME/.local/share/gnome-shell/extensions/$extension ]]; then
-        ~/.local/bin/gext install "$extension"
-		sudo cp $HOME/.local/share/gnome-shell/extensions/$extension/schemas/*.gschema.xml /usr/share/glib-2.0/schemas/
-    else
-        echo "extension <${extension}> already installed!"
-    fi
-done
-sudo glib-compile-schemas /usr/share/glib-2.0/schemas/
-
-echo "# gnome extra settings"
-echo "======================"
-gsettings set org.gnome.shell.extensions.system-monitor show-tooltip true
-gsettings set org.gnome.shell.extensions.system-monitor cpu-show-text false
-gsettings set org.gnome.shell.extensions.system-monitor cpu-graph-width 60
-gsettings set org.gnome.shell.extensions.system-monitor memory-display false
-gsettings set org.gnome.shell.extensions.system-monitor net-display false
-gsettings set org.gnome.shell.extensions.system-monitor net-show-text false
-gsettings set org.gnome.shell.extensions.system-monitor net-graph-width 40
-gsettings set org.gnome.shell.extensions.system-monitor disk-display false
-gsettings set org.gnome.shell.extensions.system-monitor icon-display false
-
-#gsettings set org.gnome.shell.extensions.dash-to-dock dock-fixed true
-gsettings set org.gnome.shell.extensions.dash-to-dock apply-custom-theme true
-#gsettings set org.gnome.shell.extensions.dash-to-dock extend-height true
-#gsettings set org.gnome.shell.extensions.dash-to-dock multi-monitor true
-
-echo "# firefox addons"
-echo "================"
-declare -A FIREFOX_ADDONS
-FIREFOX_ADDONS['uBlock0@raymondhill.net']="3740966/ublock_origin-1.34.0-an+fx.xpi"
-FIREFOX_ADDONS['fr-dicollecte@dictionaries.addons.mozilla.org']='3581786/dictionnaire_francais-7.0b.xpi'
-FIREFOX_ADDONS['chrome-gnome-shell@gnome.org']='898030/gnome_shell_integration-10.1-an+fx-linux.xpi'
-FIREFOX_ADDONS['jid1-ZAdIEUB7XOzOJw@jetpack']='3741831/duckduckgo_privacy_essentials-2021.3.8-an+fx.xpi'
-
-mkdir -p /opt/firefox/distribution/extensions
-for addon_id in "${!FIREFOX_ADDONS[@]}"; do
-    addon_part_url="${FIREFOX_ADDONS[$addon_id]}"
-    addon_xpi="/opt/firefox/distribution/extensions/${addon_id}.xpi"
-    if [[ ! -f "$addon_xpi" ]]; then
-        echo -n "Firefox addon <$addon_id> installing ..."
-        wget -q "https://addons.mozilla.org/firefox/downloads/file/${addon_part_url}" -O $addon_xpi
-        echo DONE
-    else
-        echo "Firefox addon <$addon_id> already installed!"
-    fi
-done
-
-echo "# Firefox default settings"
-echo "#========================="
-
-if [[ ! -f /opt/firefox/firefox.cfg ]]; then
-    cat <<EOF | sudo tee -a /opt/firefox/firefox.cfg
-// IMPORTANT: Start your code on the 2nd line
-
-lockPref("browser.pocket.enabled", false);
-lockPref("extensions.pocket.enabled", false);
-lockPref("browser.shell.checkDefaultBrowser", false);
-EOF
-    cat <<EOF | sudo tee -a /opt/firefox/defaults/pref/autoconfig.js
-pref("general.config.filename", "firefox.cfg");
-pref("general.config.obscure_value", 0);
-EOF
-
-else
-    echo "Firefox default settings already defined!"
-fi
-
-echo "# favourite apps"
-echo "#==============="
-runVoid "gsettings get org.gnome.shell favorite-apps | grep firefox-esr"
-if [[ "$runVoidError" == 0 ]]; then
-    gsettings set org.gnome.shell favorite-apps "['org.gnome.Nautilus.desktop','firefox-stable.desktop','org.gnome.Software.desktop']"
-else
-    echo "preserve existing apps!"
-fi
-
-echo
-echo
-echo "# DEBIAN-GNOME successfully installed!"
-echo
-
diff --git a/src/bullseye b/src/bullseye
deleted file mode 100755
index b28b87f..0000000
--- a/src/bullseye
+++ /dev/null
@@ -1,330 +0,0 @@
-#!/bin/bash
-
-## FUNCTIONS
-## ---------
-
-function trap_error() {
-    error_code=$1
-    error_line=$2
-
-    printf "\nEXIT #${error_code} due to error at line ${error_line} : \n-----------------------------------------\n"
-    sed "${error_line}q;d" $0
-    echo
-    exit $error_code
-}
-
-function runVoid() {
-    trap - ERR
-    local COMMAND="$@"
-    bash -c "${COMMAND}" >/dev/null 2>&1
-    runVoidError=$?
-    trap 'trap_error $? $LINENO' ERR
-}
-
-function askConfirmation() {
-    case "$1" in
-    y | Y | yes | YES)
-        QUESTION="(Y/n)?"
-        DEFAULT=0
-        ;;
-    *)
-        QUESTION="(y/N)?"
-        DEFAULT=1
-        ;;
-    esac
-    read -p "$QUESTION : " choice
-    case "$choice" in
-    y | Y | yes | YES) return 0 ;; #true
-    n | no | N | NO) return 1 ;;   #false
-    *) return $DEFAULT ;;
-    esac
-}
-
-# Variables and constants
-## ---------
-
-BASEDIR=/opt/debian-gnome
-ALLOWED_USERS=$(id -un) #CUSTOMIZE if needed!
-REQUIRED_PACKAGES=(
-    vim git wget
-    python3 python3-pip
-    gir1.2-gtop-2.0
-    htop tilix jq unzip
-    tilix bash-completion
-    nextcloud-desktop nautilus-nextcloud nautilus-share nautilus-image-converter
-    wl-clipboard
-    cups hplip
-    ttf-mscorefonts-installer
-)
-
-## MAIN
-## ---------
-
-[ $(id -u) -eq 0 ] && echo 'normal user required' && exit -1
-
-echo "# configure apt sources to the mithril's"
-echo "========================================"
-
-if ! grep -q debian.mithril.re /etc/apt/sources.list; then
-    echo "deb http://debian.mithril.re/debian bullseye main contrib non-free" | sudo tee /etc/apt/sources.list
-    echo "deb http://debian.mithril.re/debian bullseye-updates main contrib non-free" | sudo tee -a /etc/apt/sources.list
-    echo "deb http://debian.mithril.re/debian-security/ bullseye-security main contrib non-free" | sudo tee -a /etc/apt/sources.list
-    sudo apt update
-    sudo apt autoremove -y
-else
-    echo "# updating repositories"
-    echo "==================="
-    if [[ $(date --date='-12 hours' +%s) -gt $(date -d "$(stat -c %y /var/lib/apt/lists/partial)" +%s) ]]; then
-        sudo apt update
-        sudo apt autoremove -y
-    else
-        echo "repositories recently updated!"
-    fi
-fi
-
-echo "# required packages"
-echo "==================="
-for package in ${REQUIRED_PACKAGES[@]}; do
-    runVoid dpkg-query --status $package
-    if [ $runVoidError -ne 0 ]; then
-        echo -n "installing package <$package> ... "
-        sudo DEBIAN_FRONTEND=noninteractive apt install -y $package
-        echo "DONE"
-    fi
-done
-
-#echo "## remove hplip annoyance"
-#echo "========================="
-#if [[ -f /etc/xdg/autostart/hplip-systray.desktop ]]; then
-#    sudo rm /etc/xdg/autostart/hplip-systray.desktop
-#else
-#    echo "hplip annoyance already removed!"
-#fi
-
-echo "## debian-bash"
-echo "=============="
-if [[ ! -d /opt/debian-bash ]]; then
-    curl https://git.artcode.re/pvincent/debian-bash/raw/branch/master/install.sh | sudo bash -s -- --host
-else
-    echo "debian-bash already installed!"
-fi
-
-echo "## openssh-server"
-echo "================="
-PGKNAME='openssh-server'
-runVoid dpkg-query --status $PGKNAME
-if [ $runVoidError -ne 0 ]; then
-    set -e
-    sudo apt install -y $PGKNAME
-    sudo /opt/debian-bash/tools/append_or_replace "^#\?PermitRootLogin.*$" "PermitRootLogin no" /etc/ssh/sshd_config
-    sudo /opt/debian-bash/tools/append_or_replace "^#\?PasswordAuthentication.*$" "PasswordAuthentication no" /etc/ssh/sshd_config
-    sudo /opt/debian-bash/tools/append_or_replace "^#\?AllowUsers.*$" "AllowUsers $ALLOWED_USERS" /etc/ssh/sshd_config
-    sudo systemctl restart sshd
-    set +e
-else
-    echo "${PGKNAME} already installed!"
-fi
-
-echo "## allow hotplug eth0"
-echo "====================="
-if [[ $(grep 'auto eth0' /etc/network/interfaces.d/setup) ]]; then
-    sudo /opt/debian-bash/tools/append_or_replace "^auto eth0.*$" "allow-hotplug eth0" /etc/network/interfaces.d/setup
-else
-    echo "allow-hotplug already set up"
-fi
-
-echo "## firefox latest"
-echo "================="
-if [[ ! /usr/local/bin/firefox -ef /opt/firefox/firefox ]]; then
-    set -e
-    cd /tmp
-    wget $(curl 'https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=en-US' | cut -d '"' -f2) -O firefox-latest.tar.bz2
-    sudo mkdir /opt/firefox -p
-    sudo chown $USER /opt/firefox
-    tar -xjf firefox-latest.tar.bz2 -C /opt
-    cat <<EOF | sudo tee -a /usr/share/applications/firefox-stable.desktop
-[Desktop Entry]
-Name=Firefox Stable
-Comment=Web Browser
-Exec=/opt/firefox/firefox %u
-Terminal=false
-Type=Application
-Icon=/opt/firefox/browser/chrome/icons/default/default128.png
-Categories=Network;WebBrowser;
-MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/vnd.mozilla.xul+xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;
-StartupNotify=true
-StartupWMClass=firefox
-EOF
-    sudo ln -s /opt/firefox/firefox /usr/local/bin/firefox
-    sudo update-alternatives --install /usr/bin/x-www-browser x-www-browser /opt/firefox/firefox 200 && sudo update-alternatives --set x-www-browser /opt/firefox/firefox
-    sudo apt remove -y firefox-esr
-    set +e
-else
-    echo "firefox latest already installed!"
-fi
-
-echo "## firefox by default"
-echo "====================="
-xdg-settings set default-web-browser firefox-stable.desktop
-
-echo "## disable apparmor evince"
-echo "=========================="
-if [[ ! -L /etc/apparmor.d/disable/usr.bin.evince ]]; then
-    sudo ln -s /etc/apparmor.d/usr.bin.evince /etc/apparmor.d/disable/
-    sudo apparmor_parser -R /etc/apparmor.d/disable/usr.bin.evince
-else
-    echo "evince apparmor already disabled!"
-fi
-
-echo "## gnome default settings"
-echo "============="
-#gsettings set org.gnome.settings-daemon.peripherals.keyboard remember-numlock-state true
-gsettings set org.gnome.desktop.interface clock-show-date true
-gsettings set org.gnome.nautilus.preferences click-policy 'single'
-gsettings set org.gnome.mutter dynamic-workspaces false
-gsettings set org.gnome.desktop.wm.preferences num-workspaces 1
-gsettings set org.gnome.desktop.peripherals.touchpad tap-to-click true
-
-echo "## favorite apps"
-echo "================"
-favorite_apps=$(gsettings get org.gnome.shell favorite-apps)
-if [[ "$favorite_apps" == "['firefox-esr.desktop', 'org.gnome.Evolution.desktop', 'rhythmbox.desktop', 'libreoffice-writer.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'yelp.desktop']" ]]; then
-    gsettings set org.gnome.shell favorite-apps "['org.gnome.Nautilus.desktop','firefox-stable.desktop','org.gnome.Software.desktop']"
-fi
-
-echo "## gnome-extensions-cli"
-echo "======================="
-runVoid command gnome-extensions-cli
-if [[ $runVoidError -ne 0 ]]; then
-    sudo pip3 install gnome-extensions-cli
-else
-    echo "gnome-extensions-cli already installed!"
-fi
-
-echo "## gnome-shell install several extensions"
-echo "========================================="
-EXTENSIONS=(
-    "appindicatorsupport@rgcjonas.gmail.com"
-    "system-monitor@paradoxxx.zero.gmail.com"
-    "dash-to-dock@micxgx.gmail.com"
-    "netspeed@hedayaty.gmail.com"
-    "gsconnect@andyholmes.github.io"
-)
-
-NEED_GNOME_SHELL_RESTART=false
-for extension in "${EXTENSIONS[@]}"; do
-    if [[ ! -d $HOME/.local/share/gnome-shell/extensions/$extension ]]; then
-        NEED_GNOME_SHELL_RESTART=true
-        gnome-extensions-cli --backend file install "$extension"
-        if [[ -d $HOME/.local/share/gnome-shell/extensions/$extension/schemas ]]; then
-            sudo cp $HOME/.local/share/gnome-shell/extensions/$extension/schemas/*.gschema.xml /usr/share/glib-2.0/schemas/
-        fi
-    else
-        gnome-extensions-cli --backend file update "$extension"
-        echo "extension <${extension}> already installed!"
-    fi
-done
-sudo glib-compile-schemas /usr/share/glib-2.0/schemas/ # recompile each time
-
-echo "# gnome extra settings"
-echo "======================"
-gsettings set org.gnome.shell.extensions.system-monitor show-tooltip true
-gsettings set org.gnome.shell.extensions.system-monitor cpu-show-text false
-gsettings set org.gnome.shell.extensions.system-monitor cpu-graph-width 60
-gsettings set org.gnome.shell.extensions.system-monitor memory-display false
-gsettings set org.gnome.shell.extensions.system-monitor net-display false
-gsettings set org.gnome.shell.extensions.system-monitor disk-display false
-gsettings set org.gnome.shell.extensions.system-monitor icon-display false
-
-gsettings set org.gnome.shell.extensions.netspeed show-sum true
-gsettings set org.gnome.shell.extensions.netspeed use-bytes true
-
-gsettings set org.gnome.shell.extensions.dash-to-dock dock-fixed true
-gsettings set org.gnome.shell.extensions.dash-to-dock apply-custom-theme true
-gsettings set org.gnome.shell.extensions.dash-to-dock extend-height true
-gsettings set org.gnome.shell.extensions.dash-to-dock multi-monitor true
-
-echo "# firefox addons"
-echo "================"
-declare -A FIREFOX_ADDONS
-FIREFOX_ADDONS['uBlock0@raymondhill.net']="3740966/ublock_origin-1.34.0-an+fx.xpi"
-FIREFOX_ADDONS['fr-dicollecte@dictionaries.addons.mozilla.org']='3581786/dictionnaire_francais-7.0b.xpi'
-FIREFOX_ADDONS['chrome-gnome-shell@gnome.org']='898030/gnome_shell_integration-10.1-an+fx-linux.xpi'
-FIREFOX_ADDONS['jid1-ZAdIEUB7XOzOJw@jetpack']='3741831/duckduckgo_privacy_essentials-2021.3.8-an+fx.xpi'
-
-mkdir -p /opt/firefox/distribution/extensions
-for addon_id in "${!FIREFOX_ADDONS[@]}"; do
-    addon_part_url="${FIREFOX_ADDONS[$addon_id]}"
-    addon_xpi="/opt/firefox/distribution/extensions/${addon_id}.xpi"
-    if [[ ! -f "$addon_xpi" ]]; then
-        echo -n "Firefox addon <$addon_id> installing ..."
-        wget -q "https://addons.mozilla.org/firefox/downloads/file/${addon_part_url}" -O $addon_xpi
-        echo DONE
-    else
-        echo "Firefox addon <$addon_id> already installed!"
-    fi
-done
-
-echo "# Firefox default settings"
-echo "#========================="
-
-if [[ ! -f /opt/firefox/firefox.cfg ]]; then
-    cat <<EOF | sudo tee -a /opt/firefox/firefox.cfg
-// IMPORTANT: Start your code on the 2nd line
-
-lockPref("browser.pocket.enabled", false);
-lockPref("extensions.pocket.enabled", false);
-lockPref("browser.shell.checkDefaultBrowser", false);
-EOF
-    cat <<EOF | sudo tee -a /opt/firefox/defaults/pref/autoconfig.js
-pref("general.config.filename", "firefox.cfg");
-pref("general.config.obscure_value", 0);
-EOF
-
-else
-    echo "Firefox default settings already defined!"
-fi
-
-echo "# favourite apps"
-echo "#==============="
-runVoid "gsettings get org.gnome.shell favorite-apps | grep firefox-esr"
-if [[ "$runVoidError" == 0 ]]; then
-    gsettings set org.gnome.shell favorite-apps "['org.gnome.Nautilus.desktop','firefox-stable.desktop','org.gnome.Software.desktop']"
-else
-    echo "preserve existing apps!"
-fi
-
-echo "# AppImageLauncher"
-echo "#==============="
-# TEST ABSENCE
-if [[ ! $(dpkg -l | grep appimagelauncher) ]]; then
-    # INSTALL
-    wget https://github.com/TheAssassin/AppImageLauncher/releases/download/v2.2.0/appimagelauncher_2.2.0-travis995.0f91801.bionic_amd64.deb -O /tmp/appimagelauncher.deb
-    sudo dpkg -i /tmp/appimagelauncher.deb
-else
-    # ELSE ALREADY INSTALLED
-    echo "AppImageLauncher already installed!"
-fi
-
-echo
-echo
-echo "# DEBIAN-GNOME successfully installed!"
-echo
-
-if [[ $NEED_GNOME_SHELL_RESTART == true ]]; then
-
-    #INTERESTING: nested wayland!!!
-    #dbus-run-session -- gnome-shell --nested --wayland
-    trap - ERR
-    zenity --question --title "Rechargement de la session demandée" --width 600 --text "Des extensions GNOME ont été rajoutées à votre session.\n Voulez-vous rechargez votre session pour voir les changements ?" --timeout 10
-    case $? in
-    0)
-        echo "You answered yes"
-        killall -3 gnome-shell
-        ;;
-    1) echo "You answered no" ;;
-    5) echo "Time out" ;;
-    *) echo "Unexpected!" ;;
-    esac
-
-fi
diff --git a/src/main b/src/main
index 97bb8dd..e5fb68a 100755
--- a/src/main
+++ b/src/main
@@ -1,4 +1,284 @@
 #!/bin/bash
 
-codename=$(lsb_release -c | cut -f2)
-curl https://git.artcode.re/pvincent/debian-gnome/raw/branch/master/src/$codename | bash -s --
+## FUNCTIONS
+## ---------
+
+function trap_error() {
+    error_code=$1
+    error_line=$2
+
+    printf "\nEXIT #${error_code} due to error at line ${error_line} : \n-----------------------------------------\n"
+    sed "${error_line}q;d" $0
+    echo
+    exit $error_code
+}
+
+function runVoid() {
+    trap - ERR
+    local COMMAND="$@"
+    bash -c "${COMMAND}" >/dev/null 2>&1
+    runVoidError=$?
+    trap 'trap_error $? $LINENO' ERR
+}
+
+function askConfirmation() {
+    case "$1" in
+    y | Y | yes | YES)
+        QUESTION="(Y/n)?"
+        DEFAULT=0
+        ;;
+    *)
+        QUESTION="(y/N)?"
+        DEFAULT=1
+        ;;
+    esac
+    read -p "$QUESTION : " choice
+    case "$choice" in
+    y | Y | yes | YES) return 0 ;; #true
+    n | no | N | NO) return 1 ;;   #false
+    *) return $DEFAULT ;;
+    esac
+}
+
+# Variables and constants
+## ---------
+
+BASEDIR=/opt/debian-gnome
+ALLOWED_USERS=$(id -un) #CUSTOMIZE if needed!
+REQUIRED_PACKAGES=(
+    bash-completion
+    vim git wget curl
+    htop jq unzip
+    python3-pip
+    gir1.2-gtop-2.0 gir1.2-nm-1.0 gir1.2-clutter-1.0 gnome-system-monitor
+    tilix wl-clipboard
+    cups hplip
+    ttf-mscorefonts-installer
+    nautilus-share nautilus-image-converter
+    goldendict
+)
+
+## MAIN
+## ---------
+
+[ $(id -u) -eq 0 ] && echo 'normal user required' && exit -1
+
+echo "# configure apt sources to the mithril's"
+echo "========================================"
+if grep cdrom /etc/apt/sources.list; then
+    echo "deb http://debian.mithril.re/debian bookworm main contrib non-free-firmware" | sudo tee /etc/apt/sources.list
+    echo "deb http://debian.mithril.re/debian bookworm-updates main contrib non-free-firmware" | sudo tee -a /etc/apt/sources.list
+    echo "deb http://debian.mithril.re/debian-security bookworm-security main contrib non-free-firmware" | sudo tee -a /etc/apt/sources.list
+    sudo apt update
+    sudo apt autoremove -y
+else
+    echo "# updating repositories"
+    echo "==================="
+    if [[ $(date --date='-12 hours' +%s) -gt $(date -d "$(stat -c %y /var/lib/apt/lists/partial)" +%s) ]]; then
+        sudo apt update
+        sudo apt autoremove -y
+    else
+        echo "repositories recently updated!"
+    fi
+fi
+
+echo "# required packages"
+echo "==================="
+for package in ${REQUIRED_PACKAGES[@]}; do
+    runVoid dpkg-query --status $package
+    if [ $runVoidError -ne 0 ]; then
+        echo -n "installing package <$package> ... "
+        sudo DEBIAN_FRONTEND=noninteractive apt install -y $package
+        echo "DONE"
+    fi
+done
+
+echo "## debian-bash"
+echo "=============="
+if [[ ! -d /opt/debian-bash ]]; then
+    curl https://git.artcode.re/pvincent/debian-bash/raw/branch/master/install.sh | sudo bash -s -- --host
+else
+    echo "debian-bash already installed!"
+fi
+
+echo "## openssh-server"
+echo "================="
+PGKNAME='openssh-server'
+runVoid dpkg-query --status $PGKNAME
+if [ $runVoidError -ne 0 ]; then
+    set -e
+    sudo apt install -y $PGKNAME
+    sudo /opt/debian-bash/tools/append_or_replace "^#\?PermitRootLogin.*$" "PermitRootLogin no" /etc/ssh/sshd_config
+    sudo /opt/debian-bash/tools/append_or_replace "^#\?PasswordAuthentication.*$" "PasswordAuthentication no" /etc/ssh/sshd_config
+    sudo /opt/debian-bash/tools/append_or_replace "^#\?AllowUsers.*$" "AllowUsers $ALLOWED_USERS" /etc/ssh/sshd_config
+    sudo systemctl restart sshd
+    set +e
+else
+    echo "${PGKNAME} already installed!"
+fi
+
+firefox_lang=$(echo $LANG | cut -d_ -f1)
+[[ $firefox_lang == "en" ]] && firefox_lang="en-US"
+echo $firefox_lang
+
+echo "## firefox latest"
+echo "================="
+if [[ ! /usr/local/bin/firefox -ef /opt/firefox/firefox ]]; then
+    set -e
+    cd /tmp
+    wget $(curl "https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=$firefox_lang" | cut -d '"' -f2) -O firefox-latest.tar.bz2
+    sudo mkdir /opt/firefox -p
+    sudo chown $USER /opt/firefox
+    tar -xjf firefox-latest.tar.bz2 -C /opt
+    cat <<EOF | sudo tee -a /usr/share/applications/firefox.desktop
+[Desktop Entry]
+Name=Firefox
+Comment=Web Browser
+Exec=/opt/firefox/firefox %u
+Terminal=false
+Type=Application
+Icon=/opt/firefox/browser/chrome/icons/default/default128.png
+Categories=Network;WebBrowser;
+MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/vnd.mozilla.xul+xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;
+StartupNotify=true
+StartupWMClass=Navigator
+Actions=new-window;new-private-window;profile-manager;
+
+[Desktop Action new-window]
+Name=New Window
+Exec=/opt/firefox/firefox --new-window %u
+
+[Desktop Action new-private-window]
+Name=New Private Window
+Exec=/opt/firefox/firefox --private-window %u
+
+[Desktop Action profile-manager]
+Name=Profile Manager
+Exec=/opt/firefox/firefox -P %u
+EOF
+    sudo ln -sf /opt/firefox/firefox /usr/local/bin/firefox
+    sudo update-alternatives --install /usr/bin/x-www-browser x-www-browser /opt/firefox/firefox 200 && sudo update-alternatives --set x-www-browser /opt/firefox/firefox
+    sudo apt remove -y firefox-esr
+    sudo apt install -y libdbus-glib-1-2
+    set +e
+else
+    echo "firefox latest already installed!"
+fi
+
+echo "## firefox by default"
+echo "====================="
+xdg-settings set default-web-browser firefox.desktop
+
+echo "## gnome default settings"
+echo "============="
+gsettings set org.gnome.nautilus.preferences click-policy 'single'
+gsettings set org.gnome.mutter dynamic-workspaces false
+gsettings set org.gnome.desktop.wm.preferences num-workspaces 1
+gsettings set org.gnome.desktop.peripherals.touchpad tap-to-click true
+
+echo "## favorite apps"
+echo "================"
+favorite_apps=$(gsettings get org.gnome.shell favorite-apps)
+if [[ "$favorite_apps" == "['firefox-esr.desktop', 'org.gnome.Evolution.desktop', 'rhythmbox.desktop', 'libreoffice-writer.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'yelp.desktop']" ]]; then
+    gsettings set org.gnome.shell favorite-apps "['org.gnome.Nautilus.desktop','firefox-stable.desktop','org.gnome.Software.desktop']"
+fi
+
+echo "## gnome-extensions-cli"
+echo "======================="
+if [[ ! -f ~/.local/bin/gext ]]; then
+    pip install gnome-extensions-cli --break-system-packages
+else
+    echo "gnome-extensions-cli already installed!"
+fi
+
+echo "## gnome-shell install several extensions"
+echo "========================================="
+EXTENSIONS=(
+    "appindicatorsupport@rgcjonas.gmail.com"
+    "system-monitor-next@paradoxxx.zero.gmail.com"
+    "dash-to-dock@micxgx.gmail.com"
+    "gsconnect@andyholmes.github.io"
+    "network-stats@gnome.noroadsleft.xyz"
+)
+
+for extension in "${EXTENSIONS[@]}"; do
+    if [[ ! -d $HOME/.local/share/gnome-shell/extensions/$extension ]]; then
+        ~/.local/bin/gext install "$extension"
+        sudo cp $HOME/.local/share/gnome-shell/extensions/$extension/schemas/*.gschema.xml /usr/share/glib-2.0/schemas/
+    else
+        echo "extension <${extension}> already installed!"
+    fi
+done
+sudo glib-compile-schemas /usr/share/glib-2.0/schemas/
+
+echo "# gnome extra settings"
+echo "======================"
+gsettings set org.gnome.shell.extensions.system-monitor show-tooltip true
+gsettings set org.gnome.shell.extensions.system-monitor cpu-show-text false
+gsettings set org.gnome.shell.extensions.system-monitor cpu-graph-width 60
+gsettings set org.gnome.shell.extensions.system-monitor memory-display false
+gsettings set org.gnome.shell.extensions.system-monitor net-display false
+gsettings set org.gnome.shell.extensions.system-monitor net-show-text false
+gsettings set org.gnome.shell.extensions.system-monitor net-graph-width 40
+gsettings set org.gnome.shell.extensions.system-monitor disk-display false
+gsettings set org.gnome.shell.extensions.system-monitor icon-display false
+
+#gsettings set org.gnome.shell.extensions.dash-to-dock dock-fixed true
+gsettings set org.gnome.shell.extensions.dash-to-dock apply-custom-theme true
+#gsettings set org.gnome.shell.extensions.dash-to-dock extend-height true
+gsettings set org.gnome.shell.extensions.dash-to-dock multi-monitor true
+
+echo "# firefox addons"
+echo "================"
+declare -A FIREFOX_ADDONS
+FIREFOX_ADDONS['uBlock0@raymondhill.net']="3740966/ublock_origin-1.34.0-an+fx.xpi"
+FIREFOX_ADDONS['fr-dicollecte@dictionaries.addons.mozilla.org']='3581786/dictionnaire_francais-7.0b.xpi'
+FIREFOX_ADDONS['chrome-gnome-shell@gnome.org']='898030/gnome_shell_integration-10.1-an+fx-linux.xpi'
+FIREFOX_ADDONS['jid1-ZAdIEUB7XOzOJw@jetpack']='3741831/duckduckgo_privacy_essentials-2021.3.8-an+fx.xpi'
+
+mkdir -p /opt/firefox/distribution/extensions
+for addon_id in "${!FIREFOX_ADDONS[@]}"; do
+    addon_part_url="${FIREFOX_ADDONS[$addon_id]}"
+    addon_xpi="/opt/firefox/distribution/extensions/${addon_id}.xpi"
+    if [[ ! -f "$addon_xpi" ]]; then
+        echo -n "Firefox addon <$addon_id> installing ..."
+        wget -q "https://addons.mozilla.org/firefox/downloads/file/${addon_part_url}" -O $addon_xpi
+        echo DONE
+    else
+        echo "Firefox addon <$addon_id> already installed!"
+    fi
+done
+
+echo "# Firefox default settings"
+echo "#========================="
+
+if [[ ! -f /opt/firefox/firefox.cfg ]]; then
+    cat <<EOF | sudo tee -a /opt/firefox/firefox.cfg
+// IMPORTANT: Start your code on the 2nd line
+
+lockPref("browser.pocket.enabled", false);
+lockPref("extensions.pocket.enabled", false);
+lockPref("browser.shell.checkDefaultBrowser", false);
+EOF
+    cat <<EOF | sudo tee -a /opt/firefox/defaults/pref/autoconfig.js
+pref("general.config.filename", "firefox.cfg");
+pref("general.config.obscure_value", 0);
+EOF
+
+else
+    echo "Firefox default settings already defined!"
+fi
+
+echo "# favourite apps"
+echo "#==============="
+runVoid "gsettings get org.gnome.shell favorite-apps | grep firefox-esr"
+if [[ "$runVoidError" == 0 ]]; then
+    gsettings set org.gnome.shell favorite-apps "['org.gnome.Nautilus.desktop','firefox-stable.desktop','org.gnome.Software.desktop']"
+else
+    echo "preserve existing apps!"
+fi
+
+echo
+echo
+echo "# DEBIAN-GNOME successfully installed!"
+echo