Rated 4 out of 5 stars

It's a great plugin, but it has some issues with Firefox 4. I have the Add-On bar disabled, but whenever I use the Eyedropper tool (via keyboard shortcut or context menu) it gets enabled automatically, which is somewhat annoying. It's unnecessary because the plugin already displays the color information in a pop-out box at the bottom right corner.

This review is for a previous version of the add-on (2.5.5).