http://xmr.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/opsec/haveno-client-f2f/index.html
Arbitrators are inherited from Bisq’s 2/3 protocol. They are a trusted role and have the duty of releasing the funds to one of the two parties in case of a conflict. To do so, they use the third key of the 2/3 multisig protocol.
[...] ` To make it short, you (Bob) in this case, want to trade Fiat, for Alice's XMR, in person.