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  1. On the device you want to add, launch Firefox and click on the menu button The image "new FX Menu" does not exist.Fx57Menu.
  2. Click on Sign in to Sync at the bottom of the menu.
  3. In the SyncFirefox account panel that opens, click Sign In.
  4. On the Sign In page, enter the same email address and password you used on your other device.
  5. After you've signed in, Firefox will start syncing your information. You're all done!

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