Comment 8 for bug 1851936

Dan, yes, something clearly needs to be done to prevent similar problems from happening again with future updates. This was discussed in the upstream bug report https://bugzilla.mozilla.org/show_bug.cgi?id=1553554, but no consensus was reached.

I am considering replicating what the Debian maintainers do, i.e. set MOZ_BUILD_DATE to the timestamp of the last debian/changelog entry (https://salsa.debian.org/mozilla-team/firefox/blob/release/master/debian/upstream.mk#L33). This is not foolproof though, as it will still require making sure that the changelog timestamp is exactly the same for all Ubuntu releases.