Do you have a set of instruction to install it
Install the Tampermonkey extension if you are using any Chromium based browser (Chrome, Brave, Opera...) or Greasemonkey if you are using Firefox (untested)Then open the extension's popup/page -> Add new script -> Paste the code and save.
I am going to ask another stupid question LOL
Now how do I add note to users?
Laugh as much as you can but I can not see an input box 🤣