Please document Tor Browser environment variables

It's not uncommon for users to want Tor Browser to use their already running system Tor. Doing this requires familiarity with the TOR_SKIP_LAUNCH environment variable. Rather than only documenting one or some of the env variables, they should all be documented in one place. Users should be able to visit a single document, FAQ entry, or wiki page where they can read the functionality of

TOR_SKIP_LAUNCH TOR_FORCE_NET_CONFIG TOR_CONFIGURE_ONLY TOR_CONTROL_HOST TOR_CONTROL_PORT TOR_CONTROL_PASSWD TOR_CONTROL_COOKIE_AUTH_FILE TOR_SOCKS_HOST TOR_SOCKS_PORT TOR_TRANSPROXY

and how to set each. (Did I miss any?)