Internet Protocol version 6 is the recent version of the Internet Protocol (IP), the communications protocol that uniquely identifies network devices and routes traffic across the Internet. IPv6 was developed by the Internet Engineering Task Force (IETF) to deal with the long-anticipated problem of IPv4 address exhaustion. IPv6 is intended to replace IPv4.
Internet Protocol version 4 is a 32-bit numbers and the fourth version of the Internet Protocol (IP). It is one of the core protocols of standards-based internetworking methods in the Internet and other packet-switched networks. IPv4 was the first version deployed for production on SATNET in 1982 and on the ARPANET in January 1983.
First thing you should know the private mode in your browser does not hide your IP.
To hide your IP you should use a virtual private network, or VPN software, that encrypts your internet connection. In addition to the secure connection, most VPN software takes a detour route through multiple servers before reaching the destination to hide your identity.
Caution: make sure to use trusted VPN provider because it knows a lot about you, not only the IP address like the websites, but your device details.