i noticed because i already had it from the AUR ;)
i'm getting this with community/palemoon-bin:
(8/8) checking keys in keyring [################################] 100%
downloading required keys...
:: Import PGP key CCB09B38B048CB6D, "Evhorizon <wastelander1972@gmail.com>"? [Y/n] y
error: key "CCB09B38B048CB6D" could not be looked up remotely
error: required key missing from keyring
error: failed to commit transaction (unexpected error)
Errors occurred, no packages were upgraded.