This used to be a great extension. It no longer works on the latest versions of Firefox (I run Firefox 66). I will not contribute to the support of this extension until it once again works as it used to work.

I have FF 66. The add on no longer does anything except colour the first tab. Also, the developer doesn't answer emails.

Finally received a response from the developer. Apparently it's all FF's fault that his add on doesn't work with anything "Quantum" -- which was first introduced in 2017. Don't download it. It's useless.

Excellent, time saving extension. I couldn't work without it.

ColorfulTabs is a wonderful extension, but I'm on Firefox Quantum 65.0.2 (64-bit) and I'm still only seeing one of my tabs colored. This is disappointing; the screenshot should be replaced with one that shows the tabs as they actually appear, not as they used to appear.

Работает не так, как заявлено. Цвет имеет только текущая вкладка, остальные вкладки без цвета. Скриншот давно уже пора обновить в соответствии с актуальной версией FF

I have used ColorfulTabs for a long time. I cannot imagine being without them. Thank you.

Too bad it can no longer color all of the tabs but still a nice add-on.

Worked well until I "upgraded" to FF 65 - now just shows one color across all tabs.

This addon used to be first class, It used to color all tabs now it only colors one at a time. The screen shot shows it as it is supposed to work but it is not. Please fix this or it is worthless.

These are lovely - a must have for keeping tabs in order.