Does the wallet work with Trezor One and/or Trezor Safe 3? Those are the only hardware wallets I use.
It *only* supports hardware wallets, it does not allow hot wallets.
This holds true for mainnet, but when connected to testnet, Bitcoin Safe allows creating a "hot" wallet
i.e. wallet with its own private key without requiring pairing with a hardware wallet. In fact this is a very useful feature for Bitcoin novices, as it gives them hands-on experience working with Bitcoin while risking nothing.
Restricting mainnet wallets from holding their own private keys seems sensible, as it greatly reduces the potential attack surface on users' funds
limiting exposure solely to attacks on the hardware wallet itself.
Does the wallet work with Trezor One and/or Trezor Safe 3? Those are the only hardware wallets I use.
At least Trezor Safe 3 is in their
list of support.