Hi Jan, Sorry to hear that the page doesn't work as expected. In order to look for the root cause, please follow the steps below and provide us with more information to troubleshoot your issue. # Please check if you have Enhanced Tracking Protection (ETP) enabled. You can do that by clicking the shield [[Image:Fx89ShieldIcon]] icon at the left of the address bar. #* If ETP is enabled, try disabling it. Does the problem persist? # If the problem is not fixed, try [[How to clear the Firefox cache | clearing Firefox cache]]. Does it help? # If it does not help, also try [[Clear cookies and site data in Firefox | clearing cookies and data]] for the website you experience troubles with (''warning: you will be logged out on this website''). Does it help? # If it also does not help, try [[Diagnose Firefox issues using Troubleshoot Mode | running Firefox in Troubleshoot Mode]]. Does the problem persist? If not, please follow the steps from [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems | this article]] to troubleshoot further. Looking forward to your update!

Thank you very much for your suggestions, Denys. After clearing the cache, cookies, and data; it was the Troubleshoot Mode that did the trick.