Best add-on ever. It's so essential.

Read Bug 1320585 on Bugzilla. OMG, why don't they implement tab colouring??? They even locked comments on that bug after they saw that so many people would love to have tab colours. Why do they hate users so much?

It's nice to have at least that current workaround with ColorfulTabs. I needed the original XUL addon so much, that I actually extended it to have C&P functionality.

IMO, tab colour should not be left to addon developers, but should be a HTML meta property like: . It belongs to the same place as favicons. It's weird that you can set a favicon in HTML, but not a background to it. The first one is totally normal – the second a sacrilege? This way it would be as easy as CSS to overide the tab colour with a user or extension set colour.

Absolutely FANTASTIC

Great Extension!! :) It helps very much, to differentiate when developing in multi-level environments, like Local, Dev, Test, and PRO.

I really like this extension and I've been using it for years. A lot changed because of how FF changed. I would love to see inactive tabs colored again but hey I still find it useful even without that! Thank you!

Highly appreciate the developers' effort. The concept is good and very useful. But it seems like a lot of preferences options are removed in current version compared to old ones.