Synchronization isn’t a new feature for Mozilla Firefox but before then Mozilla Firefox 4. If you want to sync your settings, passwords, history etc., you have to install Synchronization addon for your each sync computer and all other boring register steps etc.. However now Mozilla Firefox 4 and 5 has this feature by default. Sync your computers is too easy now just follow listed steps.

*First go to “Tools” and click on “Sync”.

*Click on Set Up Firefox Sync.

*In Firefox Sync Setup dialog box, click on Create a New Account.

*Fill the blanks and accept agreement.

*Then you will be provided with your Sync Key, click on ‘Save’ to save your Sync Key and click on Next. You need to keep a back up copy of your Sync Key, as it is required to access your Firefox sync on other computers. And if you lose it even Firefox cannot recover it.

*Enter the displayed code word and click on Next.

*Now you will see a Setup Complete Message, click on Finish. Once you complete the registration process Firefox will automatically sync your data to Firefox servers.

*Now log in on the other computer in which you are trying to add to Firefox Sync by clicking on the ‘Tools’ menu on the top of the Mozilla Firefox browser, then click on Sync tab.

*Click on Set Up Firefox Sync then click on Connect, and enter your Firefox Sync details. And the code to add this computer will be displayed.

*On the first computer, again go to “Tools” and click on “Sync”.

*Then click on Add a Device, after clicking it Add a Device dialog box will be opened.

*Enter the code as displayed on your other device in the Add a Device Window, then click on Next.

*Finally, after accepting the code your device will immediately begin to sync. Then click Finish.

Don’t forget this tutorial for Mozilla Firefox 4.0 and 5.0, If you have another Firefox version download Sync addon from here.