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There's a lot here. The main thing is that rather than invoking `INNER_UNMAKE_PACKAGE`, we use the new `mach artifact install --unfiltered-project-package` flag to do that work. In automation, this gets configured using `MOZ_ARTIFACT_TASK` and is deterministic; locally, this is far easier to work with. This replacement allows us to clean up a bunch of Makefile goo, some of which is done here. More clean up is surely possible; the `mozharness` config files are a good place to look next. The `MOZ_PKG_MAC_*` settings previously referred to the unpacked DMG resources. There's no need for that complication; we can always take them from the branding resources. (The relevant `mozconfig` entries *look* to always have Nightly branding, but merge automation ensures that the branding is correctly set for Beta and Release.) Differential Revision: https://phabricator.services.mozilla.com/D249448
Common testing tools for mozilla codebase projects, test suite definitions for automated test runs, tests that don't fit anywhere else, and other fun stuff