An anonymous reader writes "Mozilla today officially launched Firefox 29 for Windows, Mac, Linux, and Android. This is a massive release: Firefox Sync has been revamped and is now powered by Firefox Accounts, there's a new customization mode, and the company's major user interface overhaul Australis has finally arrived. 'The tabs are sleek and smooth to help you navigate the Web faster. It’s easy to see what tab you’re currently visiting and the other tabs fade into the background to be less of a distraction when you’re not using them. The Firefox menu has moved to the right corner of the toolbar and puts all your browser controls in one place. The menu includes a “Customize” tool that transforms Firefox into a powerful customization mode where you can add or move any feature, service or add-on.' Here are the full release notes and a demo video."