Mozilla Releases Firefox Security Updates (May 5, 2017) May 5, 2017 by Naptown Buzz Mozilla has released security updates to address a vulnerability in Firefox and Firefox ESR. An attacker could exploit this vulnerability to take control of an affected system. US-CERT encourages users and administrators to review the Mozilla Security Advisories for Firefox 53.0.2 and Firefox ESR 52.1.1 and apply the necessary updates. ADVERTISING NOTICE Some posts and pages on Naptown Buzz contain affiliate links for which we receive an affiliate commission. Additionally, you can support Naptown Buzz by making your everyday Amazon purchases through our Amazon link.