A host of CVEs have been fixed in Debian's firefox-esr package: https://metadata.ftp-master.debian.org/changelogs//main/f/firefox-esr/firefox-esr_60.6.2esr-1_changelog
If we could pull in the latest firefox-esr from Debian, we can then make sure that our version is addressing the CVEs.
It might be good to describe the process of updating packages in Laniakea so we can distribute responsibility for this type of work.