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A gecko is a small to large Japanese [http://en.wikipedia.org/wiki/Gecko lizard] that is found in warm climates. However, in the Mozilla context Gecko refers to the [http://en.wikipedia.org/wiki/Gecko_(layout_engine) browser layout engine.]

More information about An overview of these and the various other components can be found in the [http://www.mozilla.org/newlayout/overview.html Gecko(NGLayout) Project Overview]or in the [http://www.mozilla.org/newlayout/doc/ Layout Engine Technical Documentation]