Minor issues with Fonts & Style preferences tab
First problem: there doesn't seem to be enough blank space after the Fonts heading. All other headings in the preferences dialog have a little bit more space there.
Second: all other headings on all other tabs are alphabetized. This tab is the only exception. (Should be Fonts -> Reader Mode -> Style). Maybe alphabetization is a bad way to organize preferences, but it seems to be working for all other tabs and it would probably be fine here. Even better, we could make the reader mode settings a sort of subheading of Style by indenting a few pixels.