Can't update Firefox Beta

When i try upgrading Firefox Beta via pamac upgrade -a
I’ll get the error: “firefox-beta-bin.install” file is missing or not a regular file. Is the package broken?

AUR is Arch User Repository.

There is no packages only recipes … build scripts

Check the relevant page at AUR (en) - firefox-beta-bin

You can use the developer edition which is in the repo and closely resembles the beta

sudo pacman -Syu firefox-developer-edition