Updated firefox & thunderbird packages fix security vulnerabilities

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-2015-0801, CVE-2015-0813, CVE-2015-0815). A flaw was found in the Beacon interface implementation in Firefox and Thunderbird. A web page containing malicious content could allow a remote attacker to conduct a Cross-Site Request Forgery (CSRF) attack (CVE-2015-0807). A flaw was found in the way documents were loaded via resource URLs in, for example, Firefox’s PDF.js PDF file viewer. An attacker could use this flaw to bypass certain restrictions and under certain conditions even execute arbitrary code with the privileges of the user running Firefox or Thunderbird (CVE-2015-0816)