Great ! Rated 5 out of 5 stars
Very Useful !This review is for a previous version of the add-on (0.5.3).
Rated 4 out of 5 stars
For what version of Firefox is the color picker? I use Firefox 22 Nightly. And I hope supports several color formats.This review is for a previous version of the add-on (0.5.1-signed).
For older Firefox
It's for older Firefox, current Firefox 28 has its own picker when you click the color in the css panel.