Gecko (Software)

Gecko (stylized as ɢecko) is a browser engine created by Mozilla. It powers the Firefox web browser, the Thunderbird email client, and various other applications.

Gecko is built to adhere to open Internet standards and is utilized by different software to render web pages and, in some instances, the user interface of applications themselves (by processing XUL). It provides a comprehensive programming API, making it well-suited for a diverse range of functions in Internet-connected applications, including web browsers, content display, and client/server interactions.