The Mozilla person involved in that discussion is the editor of the relevant spec, and is only involved in terms of making sure the changes are correctly indica

The Mozilla person involved in that discussion is the editor of the relevant spec, and is only involved in terms of making sure the changes are correctly indicated in the spec. I don't believe he has expressed any opinion on the changes themselves. I just filed https://github.com/mozilla/standards-positions/issues/151 https://github.com/mozilla/standards-positions/issues/151 on getting an actual Mozilla position on this.