CentOS

Will the support team be repackaging Firefox 52.9 as an rpm? I understand that Firefox has already released 60, but there are conflicts due to webapi in my current environment and I need to currently stay on Firefox 52.9.

No, Redhat have already rebased firefox in el6 and el7 to the 60.x branch. There won't be any more updates to the 52.x series.