Disabling or refusing to accept cookies

Hi,
I have got a problem with Mozilla Firefox and it seems to be redirecting all web pages unsuccessfully. Almost all websites I visit, I get the image shown below. Does anyone have an idea? I am a novice in the world of computing.

The page isn't redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept cookies.
