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.

Crashes and makes firefox lag

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.

APP看不出活動優惠，像樂天7%，不去查活動以為寫7%是全面7%，結果只有2.5%而已，早知用LINE導購3%。

hardly ever works like now it is NOT working as I am trying to book something, almost useless extension to make it work I have to shut down laptop o=and start again REALLY shopback so school boyish

the plugin can not start in taobao, need services? sorry, you can't find any!

It does not register transactions when activated!
I realised my cashbacks were not tracked/added and had to backtrack and report missing cashbacks one by one.
Not helpful to me and will revert to accessing via shopback website instead.

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