I’m now an official developer for the Sage extension for Mozilla Firefox. Sage used to go under the name RSS Reader but when it went open source it also changed its name. Sage is a light weight RSS reader that integrates with Firefox by displaying a sidebar listing your news feeds.
My main concerns when it comes to Sage is to make it more usable and make things like keeping track of what has been read easier. For example, I would like the mark read count to propagate to the RSS feed and then up to the folders containing the feed.
My first bug is to add a context menu to the item list.