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trouble with onlinebanking FF 78.0.2 <> Postbank
my trouble is the 2-way-authentification of online banking with Postbank <> Firefox 78.0.2 (64bit > Win10).
Since the law requests 2-way-authentification the login of postbank.de starts the Postbank best-sign-app on my mobile for the 2-way-authentification.
This worked well with Crome and Edge and in the past also with Firefox.
Since a few day / weeks - I can't say, when it started exactly and if it's linked with the last Firefox update or not - Firefox does not start the Postbank best-sign-app on my mobile for the 2-way-authentification (as it did before), but starts another page to ask for my password. This was "the old way" prior to the 2-way-authentification and does not grant access any more, of course.
I contacted postbank hotline and was told, that this issue is linked with the passowrt manager of Firefox.
Therefore I deleted the login data from the password manager and put the pages on "blacklist" not to save password again for thouse. I also deleted all cash and cookies and re-loaded / refreshed the web-page
Anyhow Firefox still continued going to the password site instead of starting the Postbank best-sign-app on my mobile for the 2-way-authentification (as it did before).
Again: It still worked fine and than something changed - maybe with the last Firefox Update - and now it doe not work any more.
For now I can'not access my online banking with Firefox 78.0.2 anymore, but I still can access it Edge or Chrome.
There is no option on th website to make a setting, that might cause that different behavior.
Has anyone an idea, what I can do?
Kind regards from Germany Bernhard
Web page involved: https://meine.postbank.de/#/login