Great for KDE (Linux)! Rated 5 out of 5 stars
A VERY BIG tanks to the developer!
I always have found annoying that FF in KDE (Linux) looks rather uglier compared to Windows. This theme not only gives FF the same appearance, but it looks even better!
Why is this not the default theme for Firefox for Linux?
I found this post in the Mozilla forum that explains how to make this (or any other) theme compatible with Personas: https://forums.mozilla.org/addons/viewtopic.php?f=30&t=2636
Kudos to Rob64rock and Spunker for the solution.