Automatically find and display harbor freight coupons on their website from hfqpdb.com
Never pay list price at harbor freight again!
Searches hfqpdb.com database for best coupon by item number while browsing harbor freight's website and displays the price on the webpage next to the retail price.
Update v2.0.0 - Compatibility with harbor freight website redesign!
Update v1.4.0 - moves CORS request to background page for chrome 73.