I really, really want to love this addon but it it has a single-minded inflexibility that makes it frustrating to use -- or it's hidden its settings well.
- It has Dark and Light options, but no 'leave it alone' which can cause a fair few problems
- It can't be defaulted to a 'do not modify a page unless told to' mode
This causes a lot of extra effort and can hide/mask/confuse conflicts and diagnosis when using other addons like Stylus, etc.
I adore the idea and it does a really great job at what it sets out to do, but it lacks some necessary operational flexibility.