[Bug 274641] www/firefox: 119.0 error: use of undeclared identifier 'AOM_PLANE_ALPHA' with aom-3.7.0 installed

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 22 Oct 2023 10:13:16 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274641

--- Comment #2 from Jan Beich <jbeich@FreeBSD.org> ---
poudriere build is not affected per
https://pkg-status.freebsd.org/beefy14/data/132amd64-quarterly/02a12e84c9e7/logs/firefox-119.0_1,2.log

Try bundled aom/dav1d via USE_MOZILLA += -av1 in www/firefox/Makefile.local as
a workaround. Beware of vulnerabilities:
- AOM_PLANE_ALPHA was removed upstream 5 years ago (2018-10-26)
- v1.0.0-611-g1e227d41f0 is a 5 year old snapshot (2018-09-18)
- (lib)aom decoder is less safe to use than dav1d
- Firefox on FreeBSD doesn't use sandboxing

However,
- image.avif.use-dav1d=true is default on all platforms
- media.av1.use-dav1d=true is default except on Windows aarch64

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