BlueGriffon® is an advanced Web and EPUB editor that utilizes the rendering engine originally developed for Firefox. With a rich legacy that includes notable predecessors like Netscape®, Mozilla® Composer, and Nvu, it stands out in the market. Powered by Gecko, the same engine that underpins Firefox®, BlueGriffon® boasts an array of robust features designed for both novice and experienced users. This editor has garnered a significant user base, with millions relying on it across various sectors, including educational institutions, governmental bodies, and even the European Parliament. Additionally, it has received official endorsement from the French Government, which recommends it as the Web Authoring Tool for its administration, highlighting the importance of promoting Free Software initiatives. Its widespread adoption and recognition underscore its effectiveness and reliability in web development.