InPrivate mode required for some web sites

I have discovered a few of my routine web sites do not work unless I choose InPrivate mode in EDGE.  Some do not let me log on at all, and others let me log on, but some functions just do not work in a normal mode.  I use Norton Password Manager to log into these sites.  Is it possible to enhance Password Manager to be able to edit a particular Password Manager Login profile and set a flag (provide a checkbox) to use InPrivate mode when the login is selected?  Right now, I just have a note to go into InPrivate mode, but I don't always see this note.  I have been able to enable Password Manager in InPrivate mode, so I can just always start a new InPrivate window and do all my work from there.