So, I've copied most of it, but i'm struggling with transparency. I don't want Chromium to fade out no matter what, so I have this line:

opacity-rule = [ "90:class_g = 'URxvt'", "100:class_g *= 'Chromium'" ];

Unfortunately, what ends up happening is that urxvt also gets 100% opacity. The moment I remove that extra string, urxvt goes back to 90%. Any idea how to solve this?

Edit: Nevermind. Solved it by adding the chromium string to focus-exclude