Thanks for the feedback! That effect would look nice, but currently I'm trying to make the color changes as fast as tab switches.

Thanks for the idea! In future versions it will support more webpages.

Thanks for the feedback! I will manage to test it on Firefox for Windows as soon as possible (I primarily work with a mac).

Edit: I tested the add-on on Firefox for Windows and it works well. I don't know how to reproduce the problem you're facing. Could you please file an issue on GitHub: https://github.com/easonwong-de/Adaptive-Tab-Bar-Colour/issues ?