Thank you. Yesterday, I definitely had trouble activating the shortcuts. That’s why I would have liked some clear guidance on how they are supposed to work.
Maybe it is the combination of tablet, keyboard, and Firefox that causes the problem. Even a simple Ctrl + A didn’t work a few seconds ago, but now it does work again 
. So maybe this wasn’t me not using the Discourse shortcuts correctly but a problem with Firefox. I rarely use Firefox for anything apart from Discourse and I don’t use the keyboard on my tablet often, so it’s rare that I try to use shortcuts.
It’s also possible that choosing bookmarks for further testing wasn’t the best choice either. I am not sure if all the options the shortcut help suggests still work. For example, “next business day” still doesn’t work for me, while “later today” and “delete” work fine.