Avast SafePrice is a browser extension/add-on for Chrome, Firefox, and Edge that helps you save money while you browse by notifying you about current deals and coupons.

Avira Safe Shopping for Chrome, Edge, and Opera is an extension to ensure your safety and privacy while shopping and looks for better deals from other websites.

Cross for Chrome is a free Google Chrome extension that looks for better prices while you shop on Amazon.

Fakespot for Chrome, Firefox, and Edge analyzes product reviews for reliability, helping to protect you from bad sellers and fake reviews on Amazon, etc.

Ibotta is a Chrome extension that makes it easy to get cash back every time you shop.

Karma for Chrome is a useful tool that simplifies and enhances your online shopping experience.

Keepa for Chrome, Firefox, Edge, and Opera provides price history charts for millions of Amazon products and can alert you when a price drops.

Klarna (Formerly Piggy) for Chrome and Android finds the best coupons and promotional codes and applies them automatically while you shop, saving you money.

Misabel for Chrome gives instant price comparisons and price history charts, all to help save money while you shop online.

The Rakuten Cash Back Button is the browser extension that offers coupons, deals, and cash back at over 3,500 stores.

The Camelizer can show you historical pricing on Amazon in the United States, Canada, Europe, and Australia.