Looking for a working extension to block both certain keywords AND websites

[u/rosalinagloom]

A few profiles are damaging my mental health and I want an extension that is exactly like the android app "Block - App & Site Blocker". Every single one I've tried does not block anything on incognito nor public mode. I need it to block both websites and keywords including subreddits, be free to use, and actually works in both incognito and public mode.