It doesn't look bad, but it certainly doesn't match the color scheme of breeze dark in plasma 5. It's far too light.

Beatiful theme

Not Dark.

Please make sure to keep it updated with FF changes! I love the colors!!

I use this theme on Android. It looks every similar with my notification bar. Thx.

Since Firefox 46 and its activation of GTK+3 the Breeze-dark theme of Plasma 5 is quite buggy.
I changed the theme for GTK+3 apps to Adwaita and installed this Firefox theme. This seems to work out quie good so far.

Nice theme for a consistent look in Plasma 5 not only on Kubuntu but on other distributions as well.

Sadly, Firefox 44 added a new grayish glow to the current tab and the url, search & addon bar. Theme needs to be updated to override this somehow.

Great - thanks!

nice......thank you very much :)