"Check Browser Compatibility" - error message from online banking. [View all]

It's me here again, Low Tech dude. This Group has always helped me a lot, thanks.

So something has been going on all day. The all day part was that my personalized Home page disappeared, with only the generic Home page showing, but the weird part was that it showed me as Signed In (which should give the personalized page).

Nothing else seemed to be missing until late in the day when I tried to sign in to the online banking. No go, and I made very sure that the LogIn and PW were correct. I don't like to change PWs.

The odd thing was an Option below the error message that had never showed before: "Check Browser Compatibiity." So I tried that, and it gave me a Results page for Firefox that I was using, which showed about three "Incompatible" categories. I tried IE and Edge and got basically the same two and three same Incompatibles.

The categories are: Browser & Version. Operating System. Browser Supported on OS. Javascript Enabled. Cookies Enabled. SSL Key Size. and Display Size.

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For Javascript Enabled and Cookies Enabled, the results were "True" for all three.

For SSL Key Size, it was "128 Bits" for all three.

For Display Size, Firefox 1366 x 768; IE 1051 x 591 INCOMPATIBLE; Edge/Chrome 1138 x 640 INCOMPATIBLE.

**************** the all Incompatibles were:

Browser & Version: Firefox 48.0 Incompatible. IE 11.0 Incompatible. Edge/Chrome 51.0 Incompatible.

For Operating System: "WinNT Incompatible" for all three.

For Browser Supported on OS, it was "False Incompatible" for all three

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Dear Group, I have zero idea what all this means, whether there's something in Settings possible, or whether my bank's website will have an answer tomorrow. Thanks in advance for anything.