This ticket tracks using the functionality added in Bug 1816982 and Bug 1816986 to set an extended attribute on the main Firefox.app bundle containing placeholder attribution details, and then producing an "attributable" macOS DMG with that extended attribution as part of the release pipeline.

This is sibling to https://bugzilla.mozilla.org/show_bug.cgi?id=1814727, which tracks adding placeholder attribution to Windows installers.

It would be nice to always set the xattr when producing DMGs, even just for local builds. My guess is that the "attributable" macOS DMG would be part of the macOS repackage job.