Again, the Mozilla team has to work and release Firefox 3.0.8 that does not provide any significant improvement, but resolves two vulnerabilities, both described by Mozilla as “critical.”
Specifically, the first vulnerability was discovered by the Italian hacker Giudo Landi and is related to a bug in the browser to execute malicious XML file and the second was reported by Nils, a participant of the competition Pwn2Own. (competition which aims to discover new security flaws in the three most popular operating systems: Windows, Mac and Ubuntu).Where Nills hacked Safari,IE8 and Firefox using these flaws.
In this way, it is recommended to upgrade immediately through the Help menu> Check for updates or download the new version manually.
Download | Firefox 3.0.8
More info | Release Notes