This Amazon Cart Hider does hide the cart, but on my PC (Windows 10) it also deactivates all pictures of the product so clicking on them does nothing, and if you go down to Questions and Answers about a product, you can't change from 'Most Helpful' to 'Most Recent'. That choice is dead also. So it's a tradeoff on my PC at least. As soon as I remove this Extension, those features come back.