Hi AlexZ96, Firefox does not have a site-specific redirect blocker. There is a optional global redirect blocker intended to aid users of assistance technologies like screen readers, to avoid losing their place. This is a blunt instrument and it is now a hidden setting that presumably most users do not enable. For reference: (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 Are you seeing a blocked redirect when you test your additional domains that persists after making sure the above setting is on false?