It seems the add on does not really restart Firefox, so one can not free memory or restart not working Firefox processes. So "Restart Browser" is absolutely needless to me. And with each update and may be else, I have this message quite often, a message occurs to think about a donation (for such a tiny add on on) and a new tab is opened saying anything about Time Restart, an add on from the same developer obviously, although I do not even use it and do not want that add on.