I needed a color picker which had the little eye-dropper tool. While I did not find the eye-dropper I liked what it appeared to do and so began reading the instructions. However the location of the "4 sections" and the "3 buttons" mentioned in the first paragraph did not match what appeared on my screen. I spent a little more time on learning the extension, but regretfully have to move on, so I removed it but hope to return in the near future.