From the PPA description at launchpad (https://launchpad.net/~kendalltweaver/+ ... peppermint):
The Peppermint OS welcome page: http://linuxpeppermint.com/...a fork of Lubuntu with an emphasis on cloud apps and using many configuration files sourced from Linux Mint. Peppermint uses Mozilla Prism to create single site browsers for easily accessing many popular web applications outside of the primary browser. Peppermint uses the LXDE desktop environment and focuses on being easy for new Linux users to find their way around in.