How to make the accent on selected tab blue?

So I applied an updated version of Firefox-UI-fix for Firefox 120, and now my accent on selected tabs is gone.

For context, this is what it looks like now -

The image below is in private window mode, because for some reason it works over there. Focus on the line above the selected tab, with a blue accent line. This is how I want it to be -

Here are my chrome and user.js folders.