Security flaws has been fixed on Firefox 16
Mozilla released and fixed Firefox 16, new version of Mozilla web browser. Actually, Firefox 16 has been released since few months ago. On October 11, 2012, Mozilla rereleased Firefox 16 because there're some flaws related with browser security before. I have posted article about Firefox 16 before. Evidently, that unfixed version.
Now Firefox 16 fixed version is available to download on Mozilla official website. This new version support for HTML5, CSS3 Animation, and many more.
source: CNET