For all the new users that come here because they cannot create a new account or got locked out of their current account:
FireRTC is dead. The owners and mods have not replied in over one year, haven’t unlocked existing accounts and FireRTC has not been accepting new accounts over two years now. Likelihood of reopening: almost zero. It has been a valuable tool while it lasted nevertheless.
Alternative? If you’re a scambaiter, try out BobRTC (https://bobrtc.tel/). It has been specifically created by scambaiters for scambaiters. It has tons of features like automatic call recordings, auto-redial, voice bots and many more. If you want to learn more watch my tutorial: https://www.youtube.com/watch?v=DBPmlPJnNGc
If you want to do general purpose calls like calling your relatives etc, try out TextNow (https://www.textnow.com/messaging). It allows free calls to US, Canada, Germany and UK (I think) but requires you to be from US/Canada to be able to sign up for it.