http://www.zdnet.com/article/mozilla-pa ... ec?ref=yfp
Mozilla has issued a new Firefox browser update with fixes for four critical vulnerabilities and a number of less severe issues.
In Firefox 39, a total of four critical vulnerabilities, two high-level flaws and six moderate bugs have been patched among a total of 13 fixes. According to the Mozilla security advisory, security issues relate to use-after-free vulnerabilities, poor validation processes, buffer overflow problems and a variety of memory problems.