"Fedora Core 6" was released on October 24, 2006, codenamed Zod. This release introduced the Fedora DNA artwork, replacing the Fedora Bubbles artwork used in Fedora Core 5. The codename is derived from the infamous villain, General Zod, from the Superman DC Comic Books. This version introduced support for the Compiz compositing window manager and AIGLX (a technology that enables GL-accelerated effects on a standard desktop). It shipped with Firefox 1.5 as the default web browser, and Smolt, a tool that allows users to inform developers about the hardware they use.