Due to a critical security vulnerability, Firefox 16 was pulled from the release channel shortly after its release yesterday. The vulnerability has been addressed in the release of version 16.0.1. Also addressed were two bugs resulting in crashes.
For additional information, see the Mozilla Security Blog, Security Vulnerability in Firefox 16.
Security Updates Fixed in Firefox 16.0.1
- MFSA 2012-89 default Value security checks not applied
- MFSA 2012-88 Miscellaneous memory safety hazards (rv:16.0.1)
UpdateTo get the update now, select "Help" from the Firefox menu at the upper left of the browser window, then pick "About Firefox." Mac users need to select "About Firefox" from the Firefox menu.
If you do not use the English language version, Fully Localized Versions are available for download.