I have for many years been using the Newsfox add on and consider it to be one of the the best however it appears that it may not be amended to work in FF57 and above. I have been evaluating Feedbro as an alternative and I am impressed with it.
However I would like to make a suggestion - as others here have noted - to have an additional view mode similar to the 3 pane format of Newsfox as I find this to be the most efficient way to select and read articles.
