Note: this question was originally posted on productivity SE but it was suggested that I move it here.
I am looking for an addon (preferably Firefox) or program that does the following to increase productivity, but I have no been able to find one using Google.
The tool should hide suggestions to read more on various popular websites. Hot network questions on Stack Exchange sites, 'did you know' on Wikipedia, suggested videos on Youtube...
I always find myself reading 10 unrelated Wikipedia articles or opening all hot Stack Exchange questions. I think a tool as described would be useful for many people, but I can't find one. Does one exist?