If you are having trouble getting all of your desktop information to show up on your other devices, this article will show you how to fix that by replacing the sync data you have on the server with a new copy from your desktop.

Part 1 - Reset your Firefox Sync account

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. Once the options window opens, click on the Sync tab.
3. In the Sync tab click on Manage Account and select My Sync Key
4. A new window will open displaying a Sync Key - ignore that and click Generate
5. A new Sync Key will be made for you. Please take a moment to print it out or save it on your computer. Then click Change Sync Key
   
6. You should see two status messages. The first one will say, "Changing Sync Key and uploading local data, please wait..." and the second one will say, "You Sync Key was successfully changed!"
7. Once your Sync Key has been changed the window will close.

1. Close the Settings page. Any changes you've made will automatically be saved.

Part 2 - Re-add your devices

Now that you've changed your Sync Key, any devices you had connected to your Sync account will stop syncing. You'll have to re-add them to your Sync account by following the steps in How do I add a device to Firefox Sync?