website update

Closed - This job posting has been filled and work has been completed.

Job Description

I already have a website where users can register and view their profile.
The task to be achieved:
After logging into the site the user stays logged into that tab. Opening a new tab or window opens the site in the logged out condition. The user can then login as a different user (e.g. user2) in this tab (whilst logged in the other tab as user1).
This setting can be switched on or off in various firefox and internet explorer versions.

Site details:
http://bob420.cloudaccess.net/
The site is based on joomla network.
Its backend is-
http://bob420.cloudaccess.net/administrator
Demo username/password: demo

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Skills: firefox-plugin, microsoft-internet-explorer