Mozilla sent Firefox Version 59.0.1 to the release channel today. The update addresses a critical security vulnerability uncovered in by Richard Zhu via Trend Micro's Zero Day Initiative, Pwn2Own 2018 (https://www.zerodayinitiative.com/blog/2018/3/15/pwn2own-2018-day-two-results-and-master-of-pwn).
ESR has been updated to version 52.7.2.
Security Updates (https://www.mozilla.org/en-US/security/known-vulnerabilities/firefox/#firefox58)
Release Notes (https://www.mozilla.org/en-US/firefox/59.0.1/releasenotes/)