Hey!
I’ve been struggling to debug popups and menus because they kept disappearing whenever I tried to select them in Developer Tools. After some searching, I found a solution that keeps them open.
In Chrome, press F12 to open Developer Tools. Scroll down to the Rendering tab at the bottom of the pane, and look for an option called Emulate a focused page. Check this option, and the popups and menus should stay open, making it much easier to inspect them.
Hope this helps!