Your Firefox Sync Key is a long series of characters that was created for you when you set up your Sync account. This article shows you what is the Sync Key for and how to find it or generate a new one.

What is the Sync Key used for?

The Sync KeyRecovery Key is used to encrypt your data before it's sent to the Mozilla servers. Think of it as a key that locks your information in a vault that only you can open. This means that neither Mozilla nor anyone else can read your information without having your Sync KeyRecovery Key to unlock it.

Where can I find my Firefox Sync Key?

Do these steps in Firefox on a computer that already has your Sync account set up.

1. In the Menu bar at the top of the screen, click Firefox and select Settings (select Preferences on older macOS versions).Click the menu button and select Settings.
2. Click on the Sync panel.
3. Click Manage Account and then select My Sync Key.
   
   
   A window displaying your Sync Key will open.
   
   
   
   
   Tip: It's a good idea to print or save your Sync Key so that you can access your information even when you are away from this computer.

I've lost my Sync Key

If you don't have any synced devices close to you, see the I've lost my Sync Key section in I've lost my Firefox Sync account information - What to do.