The keyboard shortcuts to manage the level of atention to a topic are not working for me, neither in firefox nor chrome.
It is very comfortable to hit m+r when i am not interested any more in the topic i am reading, but it is not working for me.
Other shortcuts that are not working for me are
m+t to track the topic
m+r to watch the topic
m+wto normalize the level of atention
m+m to mute the topic