Connect to websites using different user names with MultiFox

This is a firefox add-on that allow you to connect to websites using different user names. Simultaneously!

For example, if you have multiple Gmail accounts or yahoo mail accounts, you can open them all at the same time. Each Firefox window, managed by Multifox, accesses an account without interfering each other.Great right?

After install this extension,you must restart your firefox.After that,you will see a new choice in the right-context menu named "Open in a New Identity Profile"

the totally new fresh web browser will allow you to login with a new username without crashing with existing one.

You can get it here