In what the Mozilla Organization describes as "the first Beta release of our next generation Firefox browser", the company has released Firefox 1.5 Beta 1 (Deer Park). It is available for download here.
New features include an automated update to streamline product upgrades, faster browser navigation, drag and drop reordering for browser tabs, improvements to popup blocking and a "Clear Private Data" function that can quickly remove personal data through a menu item or keyboard shortcut.