K-Meleon is a fast, customizable, and lightweight alternative web browser that supports tabs, tools and skins, and can be configured to work with common extensions like Adblock.
K-Meleon is based on a fork of the Gecko layout engine used by Firefox. Development can seem erratic due to lack of resources but K-Meleon has seen continuous development since the 90’s (v0.7 was released in 2003).
K-Meleon Portable also available from PortableApps.com.
