As other users have mentioned, it's making firefox unusable. I've had to restart it numerous times because of this extension. Loved it when it worked.

Exceptionally useful and very well made indeed. I see some reviewers say it slows down Firefox but I haven't noticed any decrease in performance.

Outstanding visuals in general, but it is worsening the loading times of my Gmail.

Sehr enttäuschend, dass es über Nacht 10 Euro kosten soll.

La gestion des sites pourrait être mieux. Mais j'aime beaucoup quand même.

Worked great, much better than all the other extensions. I just deleted it because I found out the website I was mainly using for supported dark mode :P

Very useful but its really affecting Firefox's performance with its resource demands!
This is the second time I installed and uninstalled it because I noticed how much it kept slowing down Firefox! It literally spiking RAM and CPU usage!

Absolutely trashing performance on firefox. I think this is in theory a great add-on, and it has been in the past, but it is unusable in it's current state