It was my favorite extension for more than 10 years, so disappointed!!! Thanks to "par Blade, il y a 8 mois" for a replacement solution ++

Sadly, this add-on no longer delivers what it advertises, it only acts as a donation trap.
I used it with the previous versions of Firefox, and really sad to see it go - but it is gone, have no doubt, as other add-ons could already solve this problem with the new Firefox versions. Just go with Tree Style Tabs and TST Colored Tabs.

I would gladly change mu one star to 5 stars once dev. changes it to work as it used to work. I want to change the tabs and nothing else, I also want different coloring on different tabs, like one for active tab, one for the others, per site coloring.
But I don't want my entire browser to change color. :(
I really hope this previously great extension can be fixed.

The"new" colourful Tabs has nothing to do with the old one, which is shown in the screenshot. Actually it only colours the actual tab-and in the same coulour nearly the whole rest of the firfox header, exept the remaining tabs. The Top line colours change each time, you choose an other tab-which is more a nerve taking lightshow, because of the shrill colours, than helpful, as it was earlier! (and as it is shown falsely in the screenshot)

No longer works with the Tree Style Tab add-on so will need to look elsewhere or go without colors.

Geht seit dem letzten Update nicht mehr, jetzt ist firefox leider farbenlos.:-(

The 11/15/2019, update killed ColorfulTabs. The color is gone! Please fix or it is useless!

used to be a good addon. now its useless. doesnt do anything out of the ordinary. doesnt colour any tabs at all. waste of time installing it.

I thought this would be like the old colorful tabs, it is not! It removed my themes, and introduced a bunch of garbage.

I love to have the OLD colorful tabs back but this one CHANGED MY THEME but NOT MY TABS

It became useless. What a pity...

This add-on WAS not only incredibly useful but for those registered blind like me it was a lifesaver.

Now it has been RUINED and is NOT FIT FOR PURPOSE and NOT AS DESCRIBED. It does not look like the photo shown in screenshots, it no longer puts a different color on each tab and worse still it colors the bookmarks bar.

Now I am forced to roll back to V53 because I can't see.

Firefox is equally to blame, the developer has reported a bug for 3 years and you have done NOTHING.

How does it feel to deprive disabled people like me?

One star is because no effort has been made to fix this, just report a bug and do nothing. Maybe if you were registered blind and had to face the challenges I do every day you might have a greater sense of urgency.

No longer does what is says on the tin. I had been using this excellent add-on for the last 15 years, but you have now forced me to look elsewhere

Don't want the whole toolbar to turn colors, just the tab! Also didn't this used to be able to change tab size?

awful color scheme. distracting and no way to adjust

It doesn't work. What a mess!

Antes la usaba y creo que el manejo de pestañas en color debería venir por defecto en Firefox, lamentablemente esta aplicación NO funciona, las pestañas se ven aún peor y sin colores.

The description says "Colors every tab in a different color.", but ColorfulTabs only colors the active tab and the button background. It also adds a vertical tabs sidebar which colors all the tabs in the sidebar. I realize that, over the years, changes have been made to how extensions are implemented, but the description and screenshots should be updated.

Disappointed as this version only colors the open tab; previously ALL tabs were colored differently.

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.