Too bad KaiOS is the only major project continuing work on B2G, as they have no respect for the project. They refuse to release the code they are required to open or the code they should open in the spirit of the project.
But note that KaiOS itself doesn't ship devices, so we can't publish some of the code used by OEMs to do full builds.
While I agree that we took too long to publish this code, we were not legally infringing any license contrary to what some (even at Mozilla, lol) pretend.