I believe this was discussed in depth by the development teams, after the whole Iceweasel thing with Debian, if Firefox is in Ubuntu now the way it is then I am sure it is intentional that they are doing so with respect to the license. If you wish to restart this discussion then I believe the Ubuntu-devel-discuss list [1] would be an appropriate place for it, (also I believe this is where the original discussion was also), I am not really too sure what to recommend other than this.
Thanks, Alex. [1] https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss -- Some components are non-free https://launchpad.net/bugs/83118 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs