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How do I set up Sync on my computer?
Use a Mozilla account to sync your bookmarks, history, passwords, add-ons and open tabs with another device, profile or version of Firefox.
Choose a strong password
How to choose a strong password for your Mozilla account.
Reset your Mozilla account password with Recovery Keys
Generate an account recovery key, so you can sign in to your Mozilla account to regain access to your synced data, in case you forget your password.
What if I'm locked out of Two-Step Authentication?
Disable two-step authentication or use a backup authentication code to regain access to your account if you've been locked out of two-step authentication login.