Mozilla is on track to debut the new "Australis" user interface (UI) for Firefox next month after promoting the UI to its beta build last week. Australis, the first visual overhaul of Firefox since March 2011, was added to the "Beta" channel of Firefox 29 on March 20. Mozilla uses a three-stage development process that ships Aurora, Beta and Release versions of each version of Firefox, with six weeks separating Aurora and Beta, another six between Beta and Release.