RSS Zing is a super simple way to receive notification of new RSS feed posts. The tools button will change to show the count of new posts and will change to show an RSS feed is detected on the current page. Click the button to subscribe and to view feeds using the popup menu.
RSS Zing is designed to be lightweight, automated, and very simple to use. The extension will scan for new posts on a regular basis. Posts are automatically marked as read when clicked on.