Why do all these extensions now make the larger heading font serif even when sans is selected? I have dyslexia and have difficulty reading serif fonts. I always used another extension called Wikiwand but they changed the design last year and now uses a serif font for the larger heading fonts even when sans is selected. I looked for other extensions to replace it, and they all do it, even this one. It's so hard to read.

Well, I installed this because it's sleek, yes, but mostly for the dark theme, which doesn't seem to work. There isn't a option to make the background dark, only accents

With large margins that makes poor use of screen real estate, this "modern" redesign does indeed live up to its name.