Mozilla has pushed out the update to Firefox 15 for desktop users to address the issues with the Private Browsing not functioning correctly. Current Firefox desktop users should be offered the update shortly. Users may also manually update via Help > About Firefox and click the ‘Check for Updates’ button or go to getfirefox.com and download Firefox 15.0.1 for there. Firefox 15.0.1 for Android will be released in the coming weeks. The Private Browsing issue does not affect Android users.