Browser Honey

Honey is sweet, especially when it can save you money. Honey is a browser add-on that automatically applies coupon codes at checkout, and now it also finds better prices on Amazon immediately.

Honey brings the best final prices to the forefront after automatically comparing every top-rated seller in the Amazon marketplace.

It also lets you know if you can save money just by waiting a couple of days for delivery. Quick shipping is awesome, but so is having options, especially if those options save you money.

Shop on Amazon as usual. If Honey finds a better deal, a little tag will appear showing you how much you could save by buying the same item from a different seller. It takes into account the final price of the item (including sales tax and shipping), seller rating, delivery time, and Prime status , so you can still get Prime deals. Here is the link to add it to Firefox. LINK  and Chrome LINK.