Alad [1] filed a deletion request for nfauthenticationkey-browser- google-chrome [2]:

Trivial package. Use something like optdepends or a post-install message in nfauthenticationkey instead.

[1] https://aur.archlinux.org/account/Alad/ [2] https://aur.archlinux.org/pkgbase/nfauthenticationkey-browser-google-chrome/