Firefox for Mac, stop Apple's 2fa from popping up repeatedly in useless locations

[I am not sure this question is for Settings. None of the categories offered really seemed to fit this issue very well. Suggestions for re-posting are welcome.] On Firefox for Mac, Apple now has a pop up bubble to display the requested six digit 2FA number, first in the upper right corner, then, annoyingly, repeating often in multiple additional useless places on the screen, whether or not the code has already been used. The Apple community says there is no way to block this misbehavior through Apple, except disabling all 2FA, which is a bad idea. Is it possible to block the multiple appearances of 2fa code advisory bubble all over the place through Firefox controls? This problem reportedly does not appear on the native Mac Safari, nor reportedly on Chrome. I got to admit, I don't sign into Firefox, and not being forced to do so is a Firefox attraction for me. ]