Avoid this kind of useless shop-savings extensions that in facts can spy what you are looking on the internet, it's just collecting informations on you to profile you and similar customers to finally target ads/products/services. That's desguished spyware in counterpart to provide you a pretended nice service for free.

And just about the service provided: this kind of extensions (lots of similar exist like this one) can modify the webpages on-the-fly and also can censure some parts or search results to guide you to buy to a specific shop... instead of a concurrent. And guess who is paying the extension editor to do that? Sellers?
Just look at what this extension is requiring at the Permissions part...

Mind again before adding browser extensions!

I am Student about to programming Computer

VERY GOOD EXSPERIENCE

Tried to install it and got this message in red "Installation aborted because the add-on appears to be corrupt."

From https://haveibeenpwned.com/

ShopBack: In September 2020, the cashback reward program ShopBack suffered a data breach. The incident exposed over 20 million unique email addresses along with names, phone numbers, country of residence and passwords stored as salted SHA-1 hashes. The data was provided to HIBP by dehashed.com.

Compromised data: Email addresses, Geographic locations, Names, Passwords, Phone numbers.

It simply mean my data have been exposed

Very good

This would be good if it stayed logged in.
I start it when I am looking to buy something. But if I close the browser or leave it for a few hours or refresh to a new page.
I have to remember to check that it is still logged in and to log it back in.
It should just remain logged in in the background when your browser is open, or for a period eg 4 hours, 8 hours, till I close it.
Again today I ordered 2 items from EBay and I started up Cashback and it was green.
I closed out of Ebay and did some searching for the items, then went back to Ebay to buy.
I clicked on the Watchlist and selected the first item, ordered and paid. Selected the 2nd item and ordered and paid.
Then I noticed the S had gone back to Red ... Why does it keep turning off ugh.
So many items I have bought and then see the Red S. Very frustrating.

It stopped working and when I contacted customer support they told me to disable my antivirus!

到ShopBack有現金回饋的購物網站，工具列小圖示會閃閃爍，會提醒，很方便，只是建議，畫面右上角的詳細回饋資訊不會自動膈幾秒就關閉，都要手動關閉，對於網頁觀看來說，那個會有點妨礙閱讀，這小地方如果可以改進，就有5顆星了。

It's NOT a big deals.

very good can reward voucher and cashback

Not working for South Korea Shopback. Chrome extension is working. It's weird.