You can use the Firefox Sync add-on to synchronize your bookmarks, passwords, settings, history, and tabs with Firefox on other computers. First create a Firefox Sync account, then install and set up the Firefox Sync add-on on each of the other computers.

Step 1: Install and set up a Firefox Sync account

1. Go to the Mozilla Add-ons Firefox Sync page, and click Add to Firefox.
2. When you have finished installing Firefox Sync, click Restart Firefox. Firefox will restart with the Add-ons window open.
3. In the Add-ons window, click OptionsPreferences to open the Sync panel.
4. Click Set Up Firefox Sync.
   
   
   
5. Click I've never used Sync before.
   
   
   
6. Create a username and password. Enter your email address, and check "I agree to the Terms of Service and Privacy Policy". Then click NextContinue.
   Usernames and passwords can contain these characters: ||a-z|0-9|`|~|!|@|#|$|%|^|&|*|(|)|-|_|=|+|[ ]|{|}|\|;|:|'|"|,|.|<|>|/|?||
   
   
   
7. Create a secret phrase, then click NextContinue.
   The secret phrase is what Firefox Sync uses to encrypt your data before it sends it to the server, keeping your data more secure. You can read more about it here.
   
   
   
8. Choose what information to sync. By default, Firefox Sync will sync everything. We strongly recommend that you use this setting for the best experience. For Advanced Users, if you really want to customize your settings, you can Click on Sync Everything and set it to Use my custom settings to pick which items to sync, then click NextContinue.
   
   
   
9. Enter text from the image, then click NextContinue.
10. You will see a Setup Complete! message. Click FinishDone to close the setup window and take you back to the Sync panel.
11. You do not need to do anything else. Firefox Sync will automatically sync your data in the background from here on. Note: The sync should happen very quickly but may take up to 24 hours.
12. Make sure the initial sync has completed before you use Firefox Sync on another device. To see if the initial sync is complete, mouse over the Firefox Sync icon in the bottom right corner of the Firefox window. A tool tip should appear with a Last Update time. If there isn't a time listed or the time is a while ago, the Firefox Sync servers will not have your most recent data.
    

Step 2: Set up Firefox Sync on other installations of Firefox.

1. Install Firefox Sync - see steps 1-3 above.
2. In the Sync panel, click Set Up Firefox Sync.
3. Click I'm already using Sync on another computer.
4. Enter your Firefox Sync username and password, then click NextContinue.
   
   
   
5. Enter your secret passphrase, then click NextContinue.
   
   
   
6. You will be asked to choose what to do with the data.

• • Merge this computer's data with your Sync data - this option combines the Firefox settings stored on the server with those on this computer. We recommend using this option.
  • Replace all data on this computer with your Firefox Sync data - this option allows you to restore your Firefox data from the server copy. Great for when you are setting up a brand new computer, for example.
  • Replace all other devices with your local data - this option will erase the settings on all of your other copies of Firefox and replace them with the ones from this computer.
    
    
    

1. Click NextContinue, then confirm to start syncing your data. You can view your Firefox Sync status in the bottom-right corner of the Firefox window.

Using Firefox Sync after signing in

While you are signed in, the Sync panel allows you to control some aspects of Firefox Sync.

Firefox Sync Account

• Click Disconnect to disconnect from the Firefox Sync server. To reconnect, you will not need to re-enter your username and password. Just press Connect.
• Click ∨ Manage Account to:
  • change your password
  • change your secret phrase
  • reset your data
  • start over with another account

Browser Sync

Choose what information to sync. By default, Firefox Sync will sync everything. Click on Sync Everything and set it to Use my custom settings to pick which items to sync. You can pick from:

• Bookmarks
• Passwords
• Preferences
• History
• Tabs