Exolix doesn't support official Firo network, issues with other exchangers

General
2

Wizard Swap supports Tor/VPN and uses spark addresses.

https://www.wizardswap.io/

http://wizardswgtu2ovor7r2esg3cxdpt7tv4nrugi32lldv53zmtonbz6sid.onion/

If you have to use a transparent address for an exchange you can burn-to-redeem after and anonymize coins if your using Firo-QT.