Saves so much time and the extension itself is a seamless setup; it scraps the chessable course for you (after navigating to the "browse course" page of specified course).

Also make sure to navigate to the bottom of the settings page after clicking the extension to select the right colour, and selecting the means by which lichess displays the repertoire moves on the same settings page.

The Chessable analysis board redirecting to lichess with the FEN already imported is amazing enough by itself. No longer need to wait for the bloated chessable analysis page to fully load, copy the FEN, navigate to an external analysis tool and import the position.