Mozilla sent Firefox Version 54.0 to the release channel today. Firefox ESR was updated to version 52. The update includes 1 (one) critical, 8 (eight) high and 1 (one) moderate security update.
The next scheduled release is August 8, 2017 (5 week cycle with release for critical fixes as needed).
Mozilla Firefox Release Notes
Security vulnerabilities fixed in Firefox 54
The next scheduled release is August 8, 2017 (5 week cycle with release for critical fixes as needed).
Mozilla Firefox Release Notes
Security vulnerabilities fixed in Firefox 54