Just a quick note for anyone may have similar problem. When you see the following message when accessing a website, than clear cookies of that website.
“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”
See this post https://support.mozilla.org/en-US/questions/1053495 for the details and how to clear the cookies.