I am using Firefox Quantum 58.0.
My banking application (here CCP Connect Luxembourg) insists on popping up a completely unnecessary "undecorated window" (no toolbars or anything, on the other hand it has "facebook pixel" and "doubleclick ad exchange" trackers ... kornheiser_why.jpg) to prepare the user's login via 2-factor authentication. As I am using NoScript, and this window uses scripting, it stays blank, but I can't tell NoScript to whitelist this page as there is no NoScript icon on that window...
Let me demonstrate:
Click on "Login":
(The screenshot has a black border because I wanted to capture both windows overlaid, which means I need to "select a rectangle"; can't capture a window tree yet)
What to do?