polyzen [1] filed a deletion request for firefox-vimfx [2]:
Project reached EOL. Plenty of alternatives.
[1] https://aur.archlinux.org/account/polyzen/ [2] https://aur.archlinux.org/pkgbase/firefox-vimfx/
Request #14751 has been accepted by polyzen [1].
aur-requests@lists.archlinux.org