Let’s have a try to Multifox.

To install Multifox add-on in your Firefox, go to [You must be registered and logged in to see this link.] and click on Install Extension
button. Be sure that you are browsing from Mozilla Firefox (not Firefox
4 Beta). Multifox is not supported in Firefox 4 Beta versions.


Install it as you do with other Firefox Extensions, for more clarification see the image steps below:


And Restart your Firefox.


Now you’ve successfully installed new extension to your Firefox.

Let’s play with it.

Go to File and click on New Identity Profile.


This will open a new window of Firefox Browser. Make note of that 2 at the most right corner of the address bar.


This says that it’s the second window. Opening the new tab or new window with Browser window 2, you’ll have the same session for all the new windows and tabs.


But in case you repeat the same process (Go to File and click on New Identity Profile), you’ll have another new session browser with 3 indicated in it.


In this way you can access unlimited number of accounts in same
website with different username. For example, if you need to access 5
Gmail accounts you will need 5 windows with different identity profiles.