Bigger mouseover preview of reference

I love that, in some PDFs, when I hover the mouse over a citation number, the target of that citation pops up. However, the text in the popup is very small and I think it's unnecessarily blurry as well. Is there a way to increase the size?

https://s3.amazonaws.com/zotero.org/images/forums/u7048631/9qcv955i1k0kq99c6nzo.png
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