---

sudo bash -c '
set -e

install -d -m 0755 /etc/apt/keyrings
wget -q https://packages.mozilla.org/apt/repo-signing-key.gpg -O- > /etc/apt/keyrings/packages.mozilla.org.asc
echo "deb [signed-by=/etc/apt/keyrings/packages.mozilla.org.asc] https://packages.mozilla.org/apt mozilla main" > /etc/apt/sources.list.d/mozilla.list
cat > /etc/apt/preferences.d/mozilla << "EOF"
Package: *
Pin: origin packages.mozilla.org
Pin-Priority: 1000
EOF

apt-get update
apt-get install -y firefox-esr firefox-esr-l10n-ru

tmpdir=$(mktemp -d)
cd "$tmpdir"
wget -O telegram-desktop.tar.xz https://telegram.org/dl/desktop/linux
rm -rf /opt/Telegram
tar -xJf telegram-desktop.tar.xz -C /opt/
ln -sf /opt/Telegram/Telegram /usr/local/bin/telegram
rm -rf "$tmpdir"
'