Addon quit working after Firefox update. Loved this addon because I'm a web developer, and happen to be colorblind. Sadly I can't rely on this tool anymore to assist in my work... will find a new one.

Crashes regularly in addition to slowing down the browser.

I use this for years and I'm very happy with it. Thank you very much!

ColorZilla is back in flying colors , most of the bugs are fixed, many thanks to the developers for listening to the users, 5 stars again, wonderful app

Looks like it just doesn't work with the latest Firefox. Read (and believe) the negative reviews; any remaining positive reviews are clearly for an older version.