This is an extension that is meant to help you not paper hand $GME. If you are on Fidelity it will hide the sell buttons.
If you are a Fidelity user and worried about paper hands with your GME look no further. This extension hides the sell button so that you won't do something stupid.
In the event you do need to switch to toilet paper hands that can be done through the browser action. After a page refresh the UI will be unchanged.
If you have feature requests you can do so here: https://github.com/lukeingalls/diamond-hands-extension
Supporting the development makes it more likely to receive your feature quickly.