Gecko
Gecko is a browser engine developed by Mozilla that renders web content, including HTML, CSS, and JavaScript, for applications like Firefox and Thunderbird. It handles layout, styling, and scripting to display web pages and supports web standards such as HTML5 and CSS3. As an open-source project, it is a core component of Mozilla's software ecosystem, enabling cross-platform web browsing and application development.
Developers should learn about Gecko when working on web browser development, extensions for Firefox, or applications built with Mozilla technologies like XUL. It is essential for understanding how web content is rendered and for debugging compatibility issues in Mozilla-based browsers. Use cases include creating browser add-ons, contributing to open-source browser projects, or building desktop applications using web technologies with frameworks like Electron (though Gecko itself is not directly used in Electron).