I have been using ColorZilla for years now and it is really good.
Easy to use, never breaks and the latest release has some really good features - especially the new sampling modes

I open a lot of website at once and the color keeps me straight with what website I need to go to next.

I have used ColorZilla for years, and as a web developer, it is an indispensable tool.

However, the new UX is not as easy to work with. I honestly prefer the separate window so I can work across multiple FF tabs and with my css files. I think this is where most of the disappointment comes from others.

The added features were nice, but please if possible, bring back the old separate UX/UI window to help keep our workflow .. flowing without having to reopen that panel every time.

Thank you!

Best color picker EVER!

I've been using ColorZilla for many years. Every time I install FF on a new computer, this is one of the first extensions I load. This utility definitely makes finding an exact color code a breeze! Find the color of anything on a web page whether an image, background, or text.

ColorZilla is an indispensable Design Tool. I regularly use it to identify colors in client supplied logos and images and to match the general color tone of web pages to prominent photographs displayed on the same page. ColorZilla's feature that automatically copies picked colors to the clipboard speeds the process of going back and forth to Photoshop to create matching graphics. The UI is clean and intuitive. And the CSS Gradient generator quickly creates the code for the much lighter weight option of using CSS instead of pixel image gradients. I highly recommend it.

I've been using ColorZilla daily for years and have found it indispensable. It's accuracy and flexibility exceed that of any other color-picker. Yes, the previous update had glitches but Alex promptly resolved them with today's update. (Thanks Alex!) I highly recommend this add-on.

I've been using this plugin for a couple years and it's helped tremendously to get colors I want to use in my web and graphic designs. Recently an update changed how the add-on worked and I couldn't get it to work at all. I emailed Alex and he quickly responded, we discovered the issue was my retina iMac. He fixed the issue with the latest version, thank you!

I LOVED ColorZilla - allowed you to pick out any color (RGB, CMYK, HEX) on the web - a great tool for designers & developers, or someone who just wants the exact color they see elsewhere. HOWEVER, with the add-on update i received today, the dropdown menu on the browser for this add-on is completely different. It looks older than the previous version. Previous version had copys readily available right there in the dropdown whether you needed hex or RGB. I would have given the previous version of ColorZilla 5 stars, but because this version seems to have rolled back the hands of time in design & function, I'm giving it a 3

I'm giving 2 stars because before the update it was a 5 star add-on. If a quickly-deployed new update comes out to fix the add-on, I'll change my review to 5 stars. But if you have an add-on that doesn't do what it's advertised to do... the stars have got to go away.

This morning I was on a conference call, reading something from a webpage to a client. Suddendly, mid-sentence, ColorZilla decides it wants me to read them "Colorzilla Updated" instead. I wasn't standing next to my computer, so it sat there for several seconds before I was able to continue doing what I was doing. It made me look unprofessional in front of clients and my boss. All this for an addon I've had on my machine for less than 48 hours and have used ONCE (worked fine, at least). Will uninstall.

This is a fantastic tool I use all the time when working on my websites and projects. If you deal with color, install this. I wish it ran in windows' system tray so i could use it anywhere.

Stopped working at all with the new version, impossible to download earlier version, forced me to look for older version on a lot of sites you never know about

Great extension when I need take any color from website

Has all you can think of for color sampling on the web page and much more. Honestly, once I thought that color sampler from web developer tools is enough and I can remove this add-on, so naive of me.

Muy útil para programadores. Para detectar rápidamente los códigos de colores.

Been using this for years. Not sure why so many are having issues with the latest versions ... but it's definitely not as snappy and 'poignant' as it used to be. Regardless, I'm quite confident the author is doing his best to make it better and better and ... . So thank you for all your efforts!

Damn, used to be really useful (hence not just 1 star), and simple. Cannot get this new version with its unnecessary added features to work. If you want to keep your 4 star rating in Add-ons I advise fixing it as soon as possible.

After last update picker doesn't work at look. It sees page in different zoom or something like that, because real pixel color mismatch with scanned by addon one.

Sorry, I was forced to install the last good version (2.8.2) and disable updates:
https://addons.mozilla.org/En-us/firefox/addon/colorzilla/versions/?page=1#version-2.8.2

It used to be an amazing tool that I used every day. The 2017 releases have been absolutely terrible. I have rolled back to the last 2015 release.

Used to use this every day. Now it's a pile of rubbish. Doesn't record the colour I click on more than 2/3 of the time, records the wrong colour, laggy and slow to respond. Menu options were changed so can no longer copy RGB from first dropdown.... and Copy RGB from the new secondary menu just flat out doesn't work.

What an embarrassment!

Now I'm using Color Picker and recommend everyone to switch to that, it's light, accurate and does exactly what it needs to.

This was a very good extension, with the new update it's the worst eyedropper.

Don't know how to revert, but I do know how to uninstall. This add-on is now like a boat that refuses to float.

I had to revert back to version 2.8.2 and turn off auto updates, v3 I found totally unusable, please revert back to the earlier interface, I promise I'll donate!