K-Meleon

K-Meleon is a free and open-source, lightweight web browser for Microsoft Windows. It uses the native Windows API to create its user interface. Early versions of K-Meleon rendered web pages with Gecko, Mozilla's browser layout engine, which Mozilla's browser Firefox and its email client Thunderbird also use. K-Meleon became a popular Windows browser and was available as an optional default browser in Europe via BrowserChoice.eu. K-Meleon continued to use Gecko for several years after Mozilla deprecated embedding it. Current versions of K-Meleon use the Goanna layout engine, a fork of Gecko created for the browser Pale Moon.

K-Meleon began with the goal of being faster and lighter than Mozilla's original internet suite. Until 2011, K-Meleon embedded Gecko in a stripped-down interface. Throughout its lifespan, K-Meleon has required small amounts of random-access memory (RAM). K-Meleon 76 supports discontinued versions of Windows such as Windows XP and Windows Vista. Mozilla no longer supports these platforms after their Firefox Quantum rewrite.

Customization is another primary design goal. Users can change the toolbars, menus, and keyboard shortcuts from text-based configuration files. K-Meleon supports macros, which are small browser extensions that users can examine, write, or edit in a text editor. K-Meleon's custom configuration files can trigger macros. Reviews describe the customization features as versatile but intimidating to the average user. Due to its adaptability, K-Meleon was recommended for internet cafes and libraries in the early 2000s.