This answer was generated by AI. Please verify critical information. The Account Recovery Key is not entered in your regular Firefox Account settings. It is specifically used when you have forgotten your password and need to reset it. 1. Go to the Firefox Account sign-in page and click "Forgot password?". 2. Enter your email address. You will receive an email to reset your password. 3. On the password reset page, look for the option that says "Forgot your password? Use recovery key instead" or a similar link. 4. Click that link, and you will be prompted to enter your 32-character Recovery Key. 5. After entering the correct key, you will be able to set a new password for your account. For the exact official steps, you can check Mozilla's support article directly: [Reset your Firefox Account password with your Recovery Key](https://support.mozilla.org/en-US/kb/reset-your-firefox-account-password-recovery-keys). Sorry if this answer didn't help you.