Unofficial reMarkable 作成者: Jelle Schutter

This AddOn is directly converted from the official extension on chrome webstore.

Know Issue: Login does not work after Firefox update. Check the solution in this answer. jelleschutter/remarkable-firefox#9

Known Issues: Sending the page as PDF is not yet working. (See jelleschutter/remarkable-firefox#1)

Check out the source code used to accomplish this here: https://github.com/jelleschutter/remarkable-firefox (Contributions welcome!)