control-spec.txt mentions an
ADD_ONION command to create ephemeral hidden services. Does this exist in the latest stable release of Tor or Tor Browser Bundle?
According to the line 1405 from control-spec.txt, it's present since Tor 0.2.7.1-alpha. Current Tor Browser Bundle (version 5.0.6) use Tor 0.2.7.6, which is a stable one. ADD_ONION should be implemented.