There’s just one gotcha: as the key registration process still relies on the older Universal Second Factor standard, you’ll have to use Chrome to add a key to your account. It’ll “take some time” before you can rely solely on a third-party browser, Google’s Christiaan Brand said. Still, that support is at least on the way. It might not be too much longer before you can simply assume that your key will work anywhere there’s a spare port or Bluetooth connection.