Handy but slow Rated 3 out of 5 stars

Could be handy, but strangely the machine slowed down as soon as this was installed.
Also bad design. There is a big button on the bar, you expect that when you click the button you are take to the relevant stuff - instead you just get a lost of "supported" sites??

This review is for a previous version of the add-on (4.9.9).