Replace your Sync information

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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

Warning: This will erase all of your data stored on the server. Data loss is possible.
  1. At the top of the Firefox window, click on the Firefox button and then select OptionsAt the top of the Firefox window, click on the Tools menu and then select OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences

    Click the menu button New Fx Menu and choose OptionsPreferences

  2. Once the optionspreferences 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
    Lost Key 2
  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, "Your Sync Key was successfully changed!".
  7. Once your Sync Key has been changed the window will close.
    Note: This first sync should happen quickly but may take more than 30 minutes, depending on how much information needs to be synced.
  8. Click OK to close the Options windowClick Close to close the Preferences windowClose the Preferences window
  1. At the top of the Firefox window, click on the Firefox button and then select OptionsAt the top of the Firefox window, click on the Tools menu and then select OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences

    Click the menu button New Fx Menu and choose OptionsPreferences

  2. Once the optionspreferences window opens, click on the Sync tab.
  3. In the Sync tab click on Manage Account and select My Recovery Key.
  4. A new window will open displaying a Recovery Key - ignore that and click Generate a new key.
  5. A new Recovery Key will be made for you. Please take a moment to print it out or save it on your computer. Then click Change Recovery Key
    Change Key - Win Lost Key pt3
  6. You should see two status messages. The first one will say, "Changing Recovery Key and uploading local data, please wait..." and the second one will say, "Your Recovery Key was successfully changed!".
  7. Once your Recovery Key has been changed the window will close.
    Note: This first sync should happen quickly but may take more than 30 minutes, depending on how much information needs to be synced.
  8. Click OK to close the Options windowClick Close to close the Preferences windowClose the Preferences window

Part 2 - Re-add your devices

Now that you've changed your Sync KeyRecovery 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 set up Firefox Sync? or Use Sync to share your Firefox bookmarks, passwords and more with Firefox for mobile.

These fine people helped write this article: Tonnes, michro, Verdi, scoobidiver, Ibai. You can help too - find out how.