They are deceptive. Sometimes they don't recognize your transactions so you lose your cashback. Uninstalled.

The cashback is incorrect. I get a lower cashback than the published rate. It's cheating.

The rewards are not worth having this obnoxious add-on with it's constant annoying pop-ups. Use Cashrewards instead - the notifications are much subtler.

scam zalupa

결제 실패 한번이라도 하면 적립 제대로 안될 가능성 많음

cannot get confirmation of my email nor access therefore my cashback

TLS handshake causing issues with other sites

This addon has been using a huge amount of resources and slowing down not just browsing but performance of my system across the board. Needs to be bug fixed.

This add-on keeps slowing down / freezing pages. It didn't used to do it, please fix it!

Keep getting warnings from Firefox that this extension is slowing down the browser. Never saw these before. Please fix.

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!

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

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

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

Please don't waste your time installing this trash. They missed out many of my cashbacks and even accused me of not following their instructions which results in rejected/missing cashbacks. Then what is the point of installing the add-on if it has SO MANY restrictions and requirements which we need to follow? Isn't it supposed to be as simple as Click, Buy, Earn? They conveniently "miss out" one of my $250 orders (cashback worth $20+) and said merchant deemed the transaction as ineligible because I did/did not follow their guidelines which were all bullsh*t.