I've used this for years Rated 5 out of 5 stars

Whenever I have to re-do my Firefox preferences, this is my #1 add-on. It helps me organize, looks nice, and I've never had a problem with them. I really like this add-on.
One thing I'd add, is the ability to customize colors (for example, enabling a gray-scale theme, or choosing which colors I'd like to use. If this exists, I'm sorry for mentioning it, I don't see where I can change that though!).

Very Nice Add on ;-) Rated 5 out of 5 stars

Dieses Add on gefällt mir sehr gut. Es peppt das Design auf.

This review is for a previous version of the add-on (31.0.7). 

Rated 4 out of 5 stars

well i don´t think adding features will make this addon better, of course its your addon and you can do what you want but it would be nice to have a light version without any xtra cpu hogging

This review is for a previous version of the add-on (31.0.7).  This user has a previous review of this add-on.

RudyNowakFirefox Rated 5 out of 5 stars

bin sehr zufrieden

This review is for a previous version of the add-on (31.0.7). 

Not working with Seamonkey 2.40 Rated 1 out of 5 stars

Does not work for me on SM default theme. Seriously if you don't want to support Seamonkey then pull it from the Seamonkey extensions section. I used this for years, migrated away from FF (I'm not the only one) and this was just a tease, as well as a waste of 30 minutes trying versions clear back to 20. Yet Seamonkey is in the rdf.

This review is for a previous version of the add-on (30.0.7). 

Great Rated 3 out of 5 stars

I just have a small problem... My habits.
Ordinary when I want to click a tab I put the mouse at the top of it, the tab is selected. With Colorful Tabs, if I am not clicking EXACTLY the tab, it doesn't work. So I have to be more precise. :/

This review is for a previous version of the add-on (30.0.7). 

Very useful - super util Rated 5 out of 5 stars

A killer addon which work as expected, an additional function to rename the tab would be nice.

This review is for a previous version of the add-on (30.0.7). 

very useful add-on, some bugs Rated 4 out of 5 stars

This is an indispensable add-on for power tab users who want to colour-code tabs to prioritise. BUT shortcut key for change tab colour doesnt work, I couldn't customise the 4 default colours showing, and it only colours edges - not the whole tab? Can you please fix, and add some instructions, for 5 stars? An option to customise shortcut keys would be great!

This review is for a previous version of the add-on (30.0.5). 

Display Tab Stack Option BACKWARDS Rated 4 out of 5 stars

I'm using FF 47.0 64-bit (on WIn7, Win8.1, WIn10 - all 64-bit)
When the Option "Display Tab-Stack Below the tabs (thick colored line)" is checked, the thick line appears ABOVE the tabs ! When unchecked, there is NO thick colored line. This happens with the latest version of ColorfulTabs - and numerous previous version. This is the ONLY problem I find in this otherwise great add-on.

This review is for a previous version of the add-on (30.0.4).  This user has a previous review of this add-on.

? Rated 4 out of 5 stars

How can i disable that dark blue or black background that flashes when tabs are open before i switch to one of them..

This review is for a previous version of the add-on (30.0.4).  This user has a previous review of this add-on.

broken option in 30.0.4 for Windows Rated 5 out of 5 stars

In 30.0.4 on windows 10, Enable Fixed Background Color for Currently Selected Tab doesn't work - it's greyed out. It worked fine in 30.0.3.

Other than that, I love this add-on!

This review is for a previous version of the add-on (30.0.4). 

SO-SOOO AWESOME... When it works... :( Rated 3 out of 5 stars

I don't understand compatability issues, but 1 or more of my other addons don't work with this.
I had to disable and move on to Colorfultabs candy... it's okay, but better than my all grey tabs, right now. :/

This review is for a previous version of the add-on (30.0.4).  This user has 2 previous reviews of this add-on.

Slow Rated 2 out of 5 stars

Good effort, but makes Firefox go slow. Also noticed browser hangs a lot. Both problem resolved as soon as I removed the add on. Maybe something to look into for the developer. Dont like the box shaped tabs.

This review is for a previous version of the add-on (29.9). 

Takes Some of the Pain Out of Browsing for Peeps With ADD Rated 5 out of 5 stars

I knew that I liked this but didn't realize how much I LOVED it and how I had come to rely on it, until it was unavailable for a couple weeks during the signing process. ColorfulTabs helps me quickly focus in on the tab I am seeking; also the tabs take up less horizontal space so more tabs are displayed when I have a lot open. Thank you SOOooo MUCH for this add-on! [It's already a five but could be a 5+ if the tabs could have a bit of a reduction in vertical scale... that is not a criticism of CTs, it is my wish for every tool bar, banner, and header because the more that is displayed on my page, the less of my page I can view at once.] Thank you again. ColorfulTabs is the bomb!!! xoxoxo

This review is for a previous version of the add-on (29.9). 

Wonderful Rated 5 out of 5 stars

Wonderful addon, makes your tabs appealing to the eye and easily recognizable. Lightweight and configurable. (My settings: Generate Colors By Domain Hostname, Fading minimum, Do Not Minify Tabs, Tab Border Radious: 0 (No rounded borders). You can instead keep the defaults, but play a little yourself to find the most appealing to you.)

This review is for a previous version of the add-on (29.9). 

Rated 5 out of 5 stars

not bad

This review is for a previous version of the add-on (29.9).  This user has a previous review of this add-on.

Please Update Rated 2 out of 5 stars

It is automatically disabled since it hasn’t been signed. I could use a hack of the config but I will not jeopardize the smooth running of my Firefox 44.0. Mozilla has been warning about the signing requirement for months so this should not be a surprise to anyone. It is very disappointing.

This review is for a previous version of the add-on (29.9). 

ColorfulTabs no longer works with Firefox because of no signing Rated 1 out of 5 stars

It is very disappointing to find that the ColorfulTabs I donated to will no longer work in the current version of Firefox 44.0.0. It is automatically disabled since it hasn’t been signed. I could use a hack of the config but I will not jeopardize the smooth running of my FF. Mozilla has been warning about the signing requirement for months so this should not be a surprise to anyone. It is very disappointing.

This review is for a previous version of the add-on (29.9).  This user has 2 previous reviews of this add-on.

Ugly Rated 1 out of 5 stars

I do not like Colorful Tabs. While some people might find it handy to have the different colored tabs, the look is not as elegant as before you install it. Meaning, the tab shapes are boxy rectangles instead of the curvy-shape as is the default. For me, it's ugly and I do not enjoy looking at it. I removed it right away after I saw how unpleasant it looks. It seems like a good idea, but this version of the idea did not work for me. Sorry.

This review is for a previous version of the add-on (29.7). 

CFT is unsigned, said FF Rated 5 out of 5 stars

With FF 43, CFT is unsigned. Please release the same version like you write on AMO (AMO : 29.7 / for users to download : 29.6 = FF understand nothing more !!!!) Please correct this for next update. Thanks a lot for your addon. It is a must have.

This review is for a previous version of the add-on (29.7).