Firefox ESR 60 has been released at the same time, and is more or less identical to the non-ESR version. ESR makes a lot of sense for corporate networks, even if it can be a drag being a bit behind the curve.
Sure, ESR does make a lot of sense. According to Mozilla's timeline[0], enterprises will have to move to Firefox 60 ESR after August 2018, because the 52 ESR will be EOL after that time.
[0] https://www.mozilla.org/media/img/firefox/organizations/rele...