The following packages are affected: firefox mozilla-firefox
For details on the issues addressed with the missing upate, please visit the referenced security advisories.
Solution: The problem can be corrected by upgrading the affected package to version 1.0.8-0ubuntu4.10 (for Ubuntu 4.10), 1.0.8-0ubuntu5.04 (for Ubuntu 5.04), or 1.0.8-0ubuntu5.10 (for Ubuntu 5.10). After a standard system upgrade you need to restart Firefox to effect the necessary changes.