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Nvu is a WYSIWYG HTML editor, based on the Composer component of Mozilla Application Suite and Gecko 1.7^[2]. It is a common WYSIWYG editor for Linux and is intended to be an open source equivalent to proprietary software like Microsoft Expression Web and Adobe Dreamweaver (although to date it is missing many features they possess). As a WYSIWYG editor, it is designed to be easy for novice users and does not require any knowledge of HTML or CSS to use^[2].

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