NDAs and confidential code were mostly to let chipset vendors ship closed source version of the telephony components, so they would not have to disclose their e

NDAs and confidential code were mostly to let chipset vendors ship closed source version of the telephony components, so they would not have to disclose their extensions to the RIL standard packets, the integration with a-gps, etc. However there was an open source implementation (MozRil) that worked well enough. FirefoxOS failed commercially because we could not get on board the content partner(s) that make or break a mass market Mobile OS.