Rated 1 out of 5 stars

I NOTICED I'M NOT THE ONLY ONE WITH THIS ISSUE.
I LIKE THE THEME BUT IT'S KIND OF USELESS UNTIL THIS IS FIXED.

This review is for a previous version of the add-on (1.3.0). 

Version 1.4.2 fixes this problem, and quite a few others. I also recommend the Titlebar Tabs Cleaner extension to completely restore the classic titlebar look. Hope you'll try it out!