more data on the 500 error page: clientIPAddress 70.59.24.67 X-ClientId: 3E64525F1AD44F0EB6F087F21FAFCF42 X-Redir-Error ArLym14BP4L5cM192wg|AmWPg2YB3d5NcM192wg|ArLym14B6Tngb8192wg|AmWPg2YB85U0b8192wg|ArLym14BegO7bs192wg|AmWPg2YBHaDrbc192wg|ArLym14B7CJmbc192wg|AmWPg2YBhoK6bM192wg|ArLym14BmRZIbM192wg|AmWPg2YBGZqja8192wg|ArLym14BEFU4a8192wg|AmWPg2YBqKCYas192wg|ArLym14BXvcqas192wg|AmWPg2YBBGxzac192wg|ArLym14B_df5aM192wg|AmWPg2YBxSzeZ8192wg|ArLym14B0jpDZ8192wg|AmWPg2YBLS8lZs192wg|ArLym14BR5JaZc192wg|AmWPg2YBNtNiZM192wg|ArLym14BhDmlY8192wg X-FEServer DS7PR05CA0010 Date:7/6/2023 3:02:32 AM

This is a guess, based on the multiple redirects:

Firefox recently rolled out "Total Cookie Protection" to more users. This limits how sites can use "third party" or "cross-site" cookies, meaning cookies from different websites than the one you see in the address bar. Some sites pass you back and forth between different servers during login because they have their services spread out over a number of different servers. In those cases, you might be able to submit a form successfully on one page and then the next page says you are not logged in. Frustrating!

You can make exceptions to this feature when needed (for each server that you visit as part of the process of using this company's services). More info in the following articles:

• Introducing Total Cookie Protection in Standard Mode
• Total Cookie Protection and website breakage FAQ

Any difference?