14 DAY TRIAL // On July 6, Canonical published details about Firefox vulnerabilities for its Ubuntu 13.04, Ubuntu 12.10, and Ubuntu 12.04 LTS operating systems.
According to Canonical, Firefox could be made to crash or run programs as the user's login if it opened a malicious website. For a more detailed description of the security problems, you can visit Canonical's security notification.
Users can simply fix the security flaws by upgrading their operating systems to the latest Firefox package, specific to each distribution. The newest version of Firefox will be downloaded from the official repositories.
A normal system update, executed with the Update Manager, will implement all the necessary changes. A complete system restart is not necessary, but you will have to restart the application.
Alternatively, you can download Mozilla Firefox 23.0 right now from Softpedia.