New Firefox Update offers Private Browsing and New Download Manager: Firefox latest update offers more control on your Download management and Private Browsing. Now you can browse privately in new windows without closing or interrupting current browsing session.You can also use a private browsing window to check multiple email accounts simultaneously.Firefox comes with a new Download Manager in the Firefox toolbar, so you can monitor, view and locate downloaded files without having to switch to another window.
Firefox for Android now also supports private browsing on tabs. Firefox Android now supports less powered ARMv6 processors like Samsung Pop and HTC Aria.
via Mozilla Blog