Popup/Overlay position - Can't see "Send" button

Not sure if there is some kind of preference or if this is something I can fix myself, but I am having a problem with all of the overlays/popups for Feedly. Namely, that they are never entirely in view, so the "Send" button is obscured. The tops are always in view and I can type in them without any problem, but I always have to adjust the size of my Firefox window in order to see and click on the send button. I'm guessing that there's some setting that is putting the overlay a certain distance from the top of the page. I can post a screenshot later if I need to.

Also, not sure if this has to do with the fact that my Firefox window is typically half the height of my screen (I have a pretty large monitor and keep an eye on things in the background usually.