Mozilla Firefox v65 offers a few new features and important security fixes … so far no issues after updating to latest version

Mozilla has released security updates to address vulnerabilities in Firefox and Firefox ESR. An attacker could exploit some of these vulnerabilities to take control of an affected system.  The National Cybersecurity and Communications Integration Center (NCCIC), part of the Cybersecurity and Infrastructure Security Agency (CISA), encourages users and administrators to review the Mozilla Security Advisories for Firefox 65 and Firefox ESR 60.5 and apply the necessary updates.