As we all know, Freenet famously led to the popularity of the dark web before Tor was released. Today, there have been many dark web systems, large and small. Freenet, Tor and I2P are known as the three giants in dark web, and thereinto Tor has the largest user base. In essence, Tor (short for The Onion Router) is a free software designed to realize the anonymous Internet communication.

MOFO Linux was originally designed as one portable and bootable Linux distro (developed on the basis of Ubuntu, can be installed on HDD, USB flash drive, SD card or burned into Live DVD/USB using the included Startup Disk Creator, UNetbootin, or "DD copy method") that can be used on public computers for protecting user privacy. Gradually, it developed into one Linux operating system that emphasizes multimedia, VPN, proxy, file encryption, and disk wiping features.