Firefox users who find themselves dissatisfied with recent changes to Firefox's user interface and corresponding reductions in customizability may be interested in Pale Moon. Originally forked from Firefox in 2009, Pale Moon initially focused on improving browser performance. Since then, customizability has largely eclipsed performance as Pale Moon's primary distinguishing feature, as reflected by the project's motto, "Your browser, your way." Pale Moon has retained the fully customizable user interface from Firefox 3-28. It will also continue support for extension types that Firefox is currently working to remove (XPCOM, XUL) and for the NPAPI extensions that Firefox has already removed. Official installers are available for Windows and Linux. An unofficial, experimental installer is also available for Macintosh.