Consider using a separate account for sensitive purchases. If you've bought something on Amazon that you don't want to show in your order history, you can't delete it, but you can hide it using an ...
The same applies if you have two-factor authentication activated. If you don't want your password appearing in the bash history or on the terminal output, you can create a pw.txt in the project root ...
In particular the bit about being on a logged-in amazon page before you open the extension pop-up. If the extension can't see your amazon account, then it cannot know which years you've got orders in.