Linux Hint published a tutorial about installing Firejail in Ubuntu.
How to Install and Use Firejail in Ubuntu
Firejail is an SUID (Set User ID) program provided by linux which can be used to minimize the security issues of your system while running untrusted applications in a limited environment. Firejail uses the concept of sandbox to minimize security issues. In this blog we will see how to install and use Firejail in ubuntu.
How to Install and Use Firejail in Ubuntu