You mean a free extension that claims to give me discounts seemingly out of the goodness of their hearts that also has access to every website I go to in the browser where it is installed is not exactly on the level? I'm shocked.....well...not that shocked.
I tried it in a Firefox container once, while shopping for Xmas gifts. Not only did it want access to absolutely everything, none of the things I was looking to buy got any meaningful discount from it. Surely that would make one question how and why this thing is even still running, unless you don’t ask many questions.