My girl was looking for a dress for Halloween. Yesterday she found one on Amazon for € 35 and put it in the cart, but did not buy it. Today she looked it up again and it was € 50 so she asked me to look it up with my phone with my Amazon account - it turned out to be € 23 for me, less than half of what it’s for her!
Whatever works for you.
Personally, I have none of the above issues with Unlock origin. Its deeply tunable, so after adding a few lists past the default, it stops all the above.