Gecko (layout engine)

Gecko is a browser engine developed by Mozilla that interprets and displays web pages. It takes the code written in HTML, CSS, and JavaScript and converts it into the visual content users see on their screens. Think of it as the brain inside a web browser that organizes and renders all the elements—text, images, videos—so they appear correctly and interactively. Gecko is designed to prioritize standards compliance, security, and performance, enabling browsers like Mozilla Firefox to deliver web content consistently across different platforms.