This extension works perfectly. My only complaint is that I had to set up an API key through google developer console. This process is too difficult for people who are not skilled with computers and the internet. It would be wonderful if this extension was developed so that anybody could install it and have it work seamlessly without any configuration or work on the part of the user.
Keep up the good work.

EDIT:
when I entered custom colors for like and dislike bar, the font was the same as the background color, so it was really difficult to see what letters and numbers I was typing into the box.
Also, the box requires me to enter a '#' symbol at the beginning of the string for the color. It would be nice if the color entry box would just ignore the '#' symbol so users could choose to enter "#FFFFFF" or "FFFFFF" and either would be accepted by the box.