Microsoft has started testing two new features designed to help save you money when making purchases on retail stores. A price comparison tool will perform price comparisons of retail product pages added to a Collection. A coupon autofill is also being tested in the Microsoft Edge Canary build. Both features are currently a work in progress with only basic functionality enabled but provide insight into Microsoft’s plans for making the Edge browser stand out from the rest of the market. The feature is not working yet and only works on certain retailers, including Amazon, BestBuy, Newegg, Walmart, and Target.
Source: https://www.bleepingcomputer.com/news/microsoft/new-microsoft-edge-features-will-save-you-money-when-shopping-online/