NoFear is a tool developed by Quarkslab to sandbox applications transparently thanks to hardware virtualization. More information can be found in the website.
If you're too impatient to read the doc, install it with the following commands:
git clone https://github.com/cappsule/nofear
cd nofear/
./dl-release.sh
./build.sh filesystem
sudo ./install.sh
sudo apt install socat xpra
sudo sysctl -w net.ipv4.ip_forward=1
sudo iptables -t nat -A POSTROUTING -j MASQUERADE
And you're ready to use it:
nofear
nofear ps fauxw
nofear --gui xclock -update 1
nofear --gui --sound firefox