As of testing 2 minutes ago, downloading from the canonical "latest" location [1] vs. navigating the directory structure of the mentioned repository[2] result in identical files, which (assuming the above info is correct) means my scripted ffox upgrades have omitted the unique id, I guess?
(In my case:)
1: https://download.mozilla.org/?product=firefox-latest-ssl&os=...
2: https://ftp.mozilla.org/pub/firefox/releases/98.0.1/linux-x8...