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How does MetaMask save our mnemonic phrase? Is it saved in browser local storage? Does it encrypt our mnemonic phrase?

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How MetaMask save our mnemonic phrase?

The mnemonic phrase saved in the vault.

vault- is an encrypted storage.

Does it save in browser local storage?

Yes, but the phrase is encrypted.

Does it encrypt our mnemonic phrase?

There is a library which MetaMask uses to decrypt vault data.

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