Hi Patrick, what happens when you try to log on? For example, do you get a specific error message? Or does it just go around in a circle and return to the login page? Some articles that might be relevant: * Problems caused by restricting cookies, and how to set Firefox to allow more cookies: [[Websites say cookies are blocked - Unblock them]] * How to determine if Firefox's Tracking Protection feature is blocking content in a page, and how to make an exception: [[Tracking Protection]] -- spoiler alert: look for a "shield" icon toward the left end of the address bar next to the padlock Regarding add-ons, there are so many possible issues, but consider whether you use any content blockers (script block, ad block, tracker block, etc.) or extensions that change how cookies work. Usually add-ons create toolbar buttons that let you manage what they are doing to the page.