Hi,
When using the popup addon for the first time I added more text than the height allowed for making the text stream below the popup window. This made me think the popup was broken. But, when I removed the height size it expands to the height you need. I guessed at this. Maybe by default leave the height blank so that it resizes height based on the popup text content by default?
Also, once the height is removed and I added so much text that the text goes below the window on my browser and it scrolls down but in a very hard and unintutive way. I wish the height was constrained to the window height and a scroll bar would appear instead. Or at least some more obvious way to scroll down like a read more or something
So, love the addon but wish it was a little more.