Hi, thanks for basically enjoying the extension. That makes me happy. I integrated an on/off button into the Lichess user interface. It can be found under Preferences > Game Display > Mental Health Mode (bottom of the page).
I hope this helps.
Also, you can now disable every display of information about your rating natively in Lichess (Preferences > Site Settings > Show Player Rating). Using this, you still will be able to use all functionality of the website.
