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.

The tabs are ALL WHITE. 'Colorful' MY ASS.

Thanks!
But can you do a version compatible with TST (Tree Style Tab)? :)
Because it broke identation of tabs... :(

Es überfällt einen direkt. Viel zu viel und aufgeblasen. Ich habe keine Zeit mich stundenlang mit einem Add-on zu beschäftigen, um es passend zu machen. Wer´s mag ok, nix für mich.

keeps long hours working from getting boring, also helps with the eyestrain, great app.

It doesn´t work! The tabs are always white!

I love it but can't get it to work on Firefox, so I changed to Waterfox, would like to get it work again without re-installing Firefox.
How do I get into firefox to program "%appdata%\Mozilla\Firefox\Profile.*******\Chrome\userChrome.css"

Did not work for my version of Firefox (62.0.3). Instead of colouring the tabs .. this addon left them white and only changed the browser colour for each tab I went to when I went to them.

2 stars because it is compatible with 62.0.3. But it doesn not work as the picture shows....it only colors the active tab AND the menubar, URL bar... and all the other tabs look like they used to before this add-on was installed.

Can't deactivate the terrible sidebar "feature", so I am done with ColorfulTabs.