K-Meleon supports legacy platforms including SSE and MMX processors like the early Pentiums. K-Meleon 76 uses the Goanna fork to support platforms no longer supported by Mozilla after the Firefox Quantum rewrite.

Throughout its lifespan, K-Meleon has required small amounts of memory.

Until 2011, K-Meleon embedded Gecko in a stripped-down interface. K-Meleon began with the goal of being faster and lighter than Mozilla's original internet suite. Current versions of K-Meleon use the Goanna layout engine, a fork of Gecko created for the Pale Moon browser. After Mozilla deprecated their embedding technology, K-Meleon continued to use Gecko for several years. K-Meleon became one of the most popular browsers for Windows and was offered as an optional default browser in Europe via. The Firefox web browser and the Mozilla Thunderbird email client also use Gecko. Early versions of K-Meleon render web pages with Gecko, Mozilla's browser layout engine. Unlike cross-platform browsers, it uses the native Windows API to create its user interface. K-Meleon is a free and open-source, lightweight web browser for Microsoft Windows. Christophe Thibault, Sebastian Spaeth, Brian Harris, Jeff Doozan, Mark Liffiton, Rob Johnson, Ulf Erikson, Jordan Callicoat, Dorian Boissonnade, Roytam, et al.ħ6.4.6 (Build 20220319) (March 19, 2022 11 months ago ( ) )

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