I normally use Firefox but tried out Chrome (Windows 10) to check whether this solves my connection problems. There, the text already in the lobby is a bit blurry and unpleasant to look at for a longer time. See the attached screenshots of Firefox and Chrome in comparison.
In game, I've noticed as well that bold text in line with non-bold text looks sometimes awkward for cards in my hand. (Not when I right-click cards.) More generally, I think the font used for cards in hand makes the text hard to read.