Chess.com cheats uses Stockfish to calculate the best moves in a position. Has a movable popup window with customizable settings and info. Win all of your games!
Note: I made this project for educational purposes only. Use with caution and be smart. The extension itself will not get you banned, but repeated use of the best move will.
Source code (& releases for other browsers):
https://github.com/jameslinimk/chess-com-cheater 
