MarsSeed [1] filed a deletion request for bin32-firefox-esr52 [2]: Defunct binary package in disguise from 2020; uses a prebuilt tarball but pkgname doesn't have a -bin suffix. Not compatible with current dependency library versions. I recommend deletion.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/bin32-firefox-esr52/
