In bug 1109592, nfcd will only run when nfc is enabled The way we activate/deactivate nfcd is by using set property "ctl.start" & "ctl.stop" In emulator it seems sometimes enable/disable NFC too quick will cause nfcd won't start Currently we delay 100ms for enabling/disablubg NFC in marionette testcase as a workaround solution

This sounds like a problem we've seen in Bluetooth bug 1143925. If the Bluetooth daemon get's restarted quickly, the init progress can't catch up. You might want to check patch [1], and how we use |StartDaemonTask| and |IsDaemonRunning| to work around the problem. [1] https://bugzilla.mozilla.org/attachment.cgi?id=8599839

Firefox OS is not being worked on