The Mozilla Foundation has released Firefox 21 for Mac OS X with fixes for eight vulnerabilities (3 critical, 4 high, 1 moderate). Mozilla’s Firefox 21 resolves three critical vulnerabilities, which the company identifies as flaws that can be used to run attacker code and install software on affected machines, requiring no user interaction beyond normal web browsing.
Some of the issues resolved in the Firefox software update are potentially exploitable, allowing for remote code execution. Therefore, we strongly recommend all Firefox users apply these updates as soon as possible.
Following is a list of the security issues resolved in this update:
Users can update Firefox using the browser’s internal updater (Firefox > About Firefox > Check for Updates), or you can download the new Firefox from Mozilla’s official site.