sudo apt update
sudo apt install wget gnupg2 -y
wget -qO- https://repo.vivaldi.com/archive/linux_signing_key.pub | sudo apt-key add -
echo 'deb https://repo.vivaldi.com/archive/deb/ stable main' | sudo tee /etc/apt/sources.list.d/vivaldi.list
sudo apt update
sudo apt install vivaldi-stable