Thanks for your thorough suggestion!
However, I don’t feel like attempting it because a) I don’t feel comfortable playing programmer when I’m really not, because if I “break” something, i also need to be able to fix it… and b) It doesn’t seem to work anyway…?
After having tried “everything” else, I got the thought that either:
a) Murena needs to make a fix so that we can delete the inbuilt browser app without being programmers
b) Murena needs to change “something” in the inbuilt browser-app to make it seem more like chrome (without being chrome) so that MobilePay will accept it (don’t know if that is at all possible?)
c) MobilePay needs to change their app so that we can use other browsers when authenticating with MitID - as using other browsers when authentificating with MitID just about anywhere else isn’t a problem… (I just used MitID in the flextrafik app two days ago without problem).