I made something kinda like this for Firefox for my own purposes, but less of a note-taking app, and more something just to write markdown in columns. https://

I made something kinda like this for Firefox for my own purposes, but less of a note-taking app, and more something just to write markdown in columns. https://addons.mozilla.org/en-US/firefox/addon/colm/ https://addons.mozilla.org/en-US/firefox/addon/colm/ https://gitlab.com/kevinfiol/colm https://gitlab.com/kevinfiol/colm I don't expect it to be bug-free because it is something I made somewhat haphazardly for myself.