There should be a built in feature that Brave scans for coupons on shopping sites

I like the browser. But I have some problems with it. I did check out the Microsoft Edge browser and I did realize that Microsoft Edge searches for coupons on websites like Amazon. I would like this feature to be in Brave too. It would make online shopping easier. There should be a feature that Brave scans links for malware with Virus Total. And there’s a feature in Opera GX that there is a widget that shows the weather in your country, this feature would be really good to see in Brave. And lastly I have a question, where does Brave store the passwords you save? And should you use it?