v6.3 has been implemented as a new Extended Support Release on Jan 16, 2022. v6.3 will be supported until October 15, 2022.
We have been maintaining v5.37 as our current ESR. This version is coming to the end of its life cycle. Starting April 15, 2021 we will no longer be backporting fixes to v5.37. Please upgrade your systems to v6.3 as soon as possible to continue to receive important bug fixes and security updates and to maintain mobile compatibility.
Extended Support Releases or ESRs are intended for organizations who value stability over having the newest features and improvements, or for organizations who have a long internal testing and certification process to undergo when upgrading.