MGASA-2014-0421 Updated firefox and thunderbird packages fix security vulnerabilities

Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox or Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running it CVE-2014-1574, CVE-2014-1578, CVE-2014-1581, CVE-2014-1576,...