The keyboard shortcuts to manage the level of atention to a topic are not working for me, neither in firefox nor chrome.
The way I work with my discourse installation is: I enter a topic and if I am not interested I hit m+r, and move to another topic, but these days that I have been reading a lot here in meta, it is not working for me. And it is a pity because it is really comfortable to work with the keyboard shortcuts.
Other shortcuts that are not working for me are:
m+t to track the topic
m+w to watch the topic
m+rto normalize the level of atention
m+m to mute the topic
EDIT: Somehow the keyboard shortcuts are working for me in this topic, but not in the rest of topics
EDIT2: I think keyboard shortcuts for tracking topics stop working the moment the vertical timeline appears, because in topics with 1 reply (and no vertical timeline) they do work for me.