Super fast and incredibly helpful, allows me to experiment and try puzzles from youtube videos quickly and easily, incredible that this is available for free.

Can't really complain about anything, very good add on. The scanning is somewhat slow (can be like 5 seconds), but the other built-in functions are definitely worth 5 stars. You can do very much without even having to open a new tab. I would like it if you could actually change the Fen or just the board you scanned. If you are too slow on twitch, it is very annoying if you actually want to analyze a position from a move earlier. And the position creating tool is not working btw, idk if you are still developing that one.