sudo -i
snap list
snap remove firefox firmware-updater snap-store
snap remove gtk-common-themes gnome-42-2204 snapd-desktop-integration
snap remove core22 bare
snap remove snapd
apt autoremove snapd


vi /etc/apt/preferences.d/nosnap
Package: snapd
Pin: release *
Pin-Priority: -1

TEST :
apt install snapd
apt install chromium-browser

INSTALL :
apt install gnome-software
apt install gnome-software-plugin-flatpak
apt install synaptic
apt install gdebi

INSTALL FIREFOX REPOS :
sudo install -d -m 0755 /etc/apt/keyrings

wget -q https://packages.mozilla.org/apt/repo-signing-key.gpg -O- | sudo tee /etc/apt/keyrings/packages.mozilla.org.asc > /dev/null

echo "deb [signed-by=/etc/apt/keyrings/packages.mozilla.org.asc] https://packages.mozilla.org/apt mozilla main" | sudo tee -a /etc/apt/sources.list.d/mozilla.list > /dev/null

echo '
Package: *
Pin: origin packages.mozilla.org
Pin-Priority: 1000

Package: firefox*
Pin: release o=Ubuntu
Pin-Priority: -1' | sudo tee /etc/apt/preferences.d/mozilla

sudo apt update && sudo apt remove firefox
sudo apt install firefox
sudo apt install firefox-l10n-fr

INSTALL THUNDERBIRD REPOS :
sudo add-apt-repository ppa:mozillateam/ppa

sudo vim /etc/apt/preferences.d/mozillateamppa
Package: thunderbird*
Pin: release o=LP-PPA-mozillateam
Pin-Priority: 1001

sudo apt update
sudo apt install thunderbird