It literally broke the first website I tried it on.

Functionary not

Mostly good and has been helpful for the vast majority of sites. However, a recent update has made it incompatible with Roll20 virtual tabletop game pages, which I use regularly; I can access the rest of the site just fine, but the pages on which the VTT portion is accessed just shows up as a blank black page. Please fix!

I like it a lot! It lets me adjust how "white" the white space is -- much better for the eyes!

I still remember how great it was when it could actually auto-detect site theme without relying on OS theme...
And there are STILL bug when if you switch auto -> on -> auto that it'll discard saved options and will default to "OS theme" even tho it's not even checked