in versions_util.py [0:0]
def get_channel_versions(channel, product="Firefox"):
channel = channel.lower()
version = str(get(base=True)[channel])
if channel == "nightly":
return ["{}.0a1".format(version)]
elif channel == "release":
return ["{}.0".format(version)] + getStabilityReleases(version)
elif channel == "beta":
return getDevelopmentReleases(version)
else:
assert False, "Unknown channel {}".format(channel)