Layout “unijoy” not found – Got this Joomla problem finally fixed

I was suffering from this problem from long time. Just few minutes ago I got the real and effective solution for it. The main solution remains here and here. Recently also came to know that problem remains in Firefox and Flock. It was working fine on IE and Safari. So solution only needs for Firefox and variants.

The solution is simple. Somehow a cookie is created named ‘layout’ and with value ‘unijoy’. You just need to detele it.