"Mark previous as read" button
A button for marking all posts older than the current one as read. This would allow me to skip older posts, and check only the most recent ones in some of my overcrowded folders...
Mark Miller commented
Here is the userscript that I used for this feature with Google Reader.
Would really like to have this a built-in feature with Feedspot as a non-intrusive pop-up like the "scroll to top" when you start scrolling down through a feed.