The private key for the FIDO U2F software is also based on the seed phrase of the wallet? For example when I enter the seed phrase on another Ledger device and install the U2F app on it, I can then still authenticate myself on my websites with this FIDO U2F app, although it was restored on another device?

Besides, I noticed, that all installed apps were removed when upgrading to the latest firmware. Does this also affect the private FIDO U2F key?

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