Review for infoRSS by SoAnIs
Rated 4 out of 5 stars
This is a very powerful RSS reader. It's the only one I've found with properly working feed scroller, and it provides many options for display of the feeds. It does seem to increase Firefox resource usage a bit more than is desirable, but other than that it is an excellent addon.
This review is for a previous version of the add-on (1.1.2).To create your own collections, you must have a Mozilla Add-ons account.