[Tails-dev] Torbutton in crazy DEBUG mode dumping ALL histor…

Some of the truncated entries:

# Torbutton INFO: SSC: Set cacheDomain to
# Torbutton INFO: Torbutton debug output ready
# Torbutton INFO: SSC: Segmenting
# Torbutton INFO: SSC: Parent
# mozIThirdPartyUtil.getFirstPartyURIFromChannel
# Torbutton INFO: SSC: No cache isolation parent
# Torbutton DBUG: onLocationChange

I deleted the file and it wasn't recreated in the Tails 1.2 session,
but this isn't a fix I'm looking for.

Why is Torbutton in DEBUG mode, spewing info about the sites you visit
into amnesia user's .xsession-errors file and where can I turn this
Torbutton DEBUG setting OFF?