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500 error version 98.0.1

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It is very frustrating that Firefox requires updates so often. I only have my banking in FF because it does seem more secure than other browsers. So I need to do banking immediately and FF of course wants to upgrade. Ok, I upgrade to 98.0.1 Now I get 500 error when I attempt to log into my one banking account. There is no error when I use Chrome. And so I revert back to version 97.0 and now I'm forced to use a new profile. Ok, I use the new profile and lo and behold I can now log into my bank account without any 500 error. So obviously the latest version has some problem with authentication. So I try to get version 97.0 to utilize my previous profile. But it won't every time I select my good profile as the default and relaunch it relaunches with 98.0.1 which must be stored someplace in the profile data.

How do I get the good profile to open with the older version of the software? There must be some file in the profile set of files that I can edit to get it to think it is version 97.0 and be able to start my good profile with my good version of FF. Please help!!

It is very frustrating that Firefox requires updates so often. I only have my banking in FF because it does seem more secure than other browsers. So I need to do banking immediately and FF of course wants to upgrade. Ok, I upgrade to 98.0.1 Now I get 500 error when I attempt to log into my one banking account. There is no error when I use Chrome. And so I revert back to version 97.0 and now I'm forced to use a new profile. Ok, I use the new profile and lo and behold I can now log into my bank account without any 500 error. So obviously the latest version has some problem with authentication. So I try to get version 97.0 to utilize my previous profile. But it won't every time I select my good profile as the default and relaunch it relaunches with 98.0.1 which must be stored someplace in the profile data. How do I get the good profile to open with the older version of the software? There must be some file in the profile set of files that I can edit to get it to think it is version 97.0 and be able to start my good profile with my good version of FF. Please help!!

Chosen solution

Try to click the Shield icon in the URL bar and remove cookies for that website.

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Chosen Solution

Try to click the Shield icon in the URL bar and remove cookies for that website.

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In fact I think clearing the cookies for my banking site may have worked using the current version. After going through the process of copying profiles, and starting with -ProfileManager and -allow-downgrade from command line, I think all this could have been avoided had I just simply removed the cookies. Just FYI for anyone else who encounters this.