Rated 4 out of 5 stars

I don't like giving my info to Alexa, esp. given they are owned by the insatiable and nasty Amazon.com, but it's helpful for seeing rankings on the fly.

Noting caveat, at this point one of my favorite add-ons; my top is still Bargain Book Mole which lets me find the lowest used and new book prices on the fly, from any website.

This review is for a previous version of the add-on (1.4.9).