This add-on doesn't do what it promises and steals from other people.
It promises the best coupon but if a store pays them they will let them choose the maximum/best coupon it will show the user. So there may be a coupon code for a 15% discount but honey and the shop agreed on a maximum 5% and that's what you get.
If you use it after clicking on a referral link from someone else (hoping/thinking that the creator that gave you the link will get some remuneration) Honey steals referral cookies claiming as its own the referral and getting the remuneration you meant to give to someone else, even when it gives you no discount code whatsoever.