Please explain the problem in detail. What happens? What is the exact error messages?

Hmm, it sounds like this one:

If you are getting a bar that says Firefox prevented a redirect, and having an Allow button, please make sure the reload/redirect block is turned off:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.

(2) In the search box above the list, type or paste access and pause while the list is filtered

(3) If the accessibility.blockautorefresh preference is bolded and "modified" or "user set" to true, double-click it to restore the default value of false

Any improvement?