The most common way until now has been a browser plugin, like MAFIAAFire, but alternate DNS systems are starting to become more popular. One of those, OpenNIC, is looking to capitalise on that with its new .pirate TLD (top level domain).
Registration takes just minutes, and then your new .pirate domain will be accessible by anyone using one of OpenNIC’s many DNS servers.
Gotta have one. Check out the available TLDs: http://www.opennicproject.org/