The Tails Project released the live OS Tails 5.3, a live operating system running from every computer without leaving traces on the machine and not even on the internet.
This particular operating Tails was used by her former employee NSAEdward Snowden to stay hidden on the internet.
To use Tails, shut down your computer, and start the anonymous operating system from a USB stick instead of starting with Windows, macOS, or Linux. This is how you turn your computer into a very safe machine. You'll be safe even if you're using someone else's computer.