You can rent hashing power on NiceHash and point it to Nanopool to mine Firo. To create an order on NiceHash you have to use the following settings:
Algorithm: FiroPow
Stratum hostname or IP: firo-eu1.picopool.org (or any other Nanopool's server)
Port: 22222
Username: YOUR_WALLET.YOUR_WORKER/YOUR_EMAIL
(example: aNt6zWE4CFe9XVtvM2VjHttDxitLSrPyQd.NH/mail@example.com)
Password: x
Please keep in mind that you have to use an Firo address when creating an order on NiceHash, otherwise, you will not receive your reward.
NOTE: By filling your email address in, you will be able to receive email alerts from the pool each time your miner goes offline, otherwise, fill a passphrase instead to access the account settings.