Editors' Note: The Download Now link will redirect to the extension page. To install the extension directly, click on the install button on the page.
Sage is a lightweight RSS and Atom feed aggregator extension for Mozilla Firefox. It is got a lot of what you need and not much of what you don't. Features include reads RSS and Atom feeds, feed Discovery, integrates with Firefox's bookmark storage and Live Bookmarks, imports and exports OPML feed lists, newspaper feed rendering customizable via style sheets, and Technorati and RSS search engine integration.
What's new in this version:
Version 1.4.13 fixes Feed rendering broken in Firefox 17.