Review for Ziftr Alerts (formerly FreePriceAlerts) by 3scissors
Rated 5 out of 5 stars
Nice add-on. Usually finds lower prices than Invisiblehand and includes price alerts and price history for when you are not in a rush to buy something. Very satisfied.
This review is for a previous version of the add-on (1.5.1-signed.1-signed).To create your own collections, you must have a Mozilla Add-ons account.