As part of Mozilla's security update process, Firefox 1.5.0.9, Firefox 2.0.0.1, and Thunderbird 1.5.0.9 are now available for Windows, Mac, and Linux for free download from getfirefox.com & getthunderbird.com. The update is available in 41 languages including Spanish, Japanese, Arabic, Hungarian, and more.

Firefox 1.5.0.x will be maintained with security and stability updates until April 24, 2007. Mozilla recommends users to upgrade to Firefox 2. Firefox 1.5.0.9 is available for download from http://www.mozilla.com/firefox/all-older.html.

If you already have Firefox 1.5.0.x, Firefox 2.0.0.x, or Thunderbird 1.5.0.x, you will receive an automated update notification within 24 to 48 hours. This update can also be applied manually by selecting "Check for Updates..." from the Help menu at any time.

For more information, read:

Firefox 1.5.0.9 Release Notes
Firefox 2.0.0.1 Release Notes
Thunderbird 1.5.0.9 Release Notes.