Multiple flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox (CVE-2016-2836, CVE-2016-5258, CVE-2016-5259, CVE-2016-5252, CVE-2016-5263, CVE-2016-2830, CVE-2016-2838, CVE-2016-5254, CVE-2016-5262, CVE-2016-5264, CVE-2016-5265, CVE-2016-2837).