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Apps with 'Gecko' feature
Firefox Nightly is the development (alpha) release channel of Mozilla Firefox . Firefox Nightly gets a new version every few hours. It offers access to bleeding edge features of the development branch of Firefox before they make a final release. Lunascape is a new web browser that handles all three major web rendering engines — Mozilla Firefox’s Gecko, Internet Explorer’s Trident, and WebKit (which is used by Google Chrome and Safari.