RSS readers are quickly becoming the best tools for staying up to date with the latest postings on your favorite Web sites and Blogs. Mozilla built a full RSS reader into its Thunderbird mail client, but Firefox can make use of RSS as well.
You may have noticed a button called "Latest Headlines" on Firefox's Bookmarks toolbar. When you click on the button, you're presented with a dynamically generated list of links to current news stories. This is what Firefox calls a Live Bookmark, and it's generated by an RSS feed. You can click through to any link on the list, or open every item all at once.
When you visit a site that has a feed, you'll see a little Live Bookmark icon in the lower right of the browser window. Click the icon and you'll see a list of all published feeds. Choose the feed you want and Firefox asks where it should store the Live Bookmark. Choose 'Bookmarks Toolbar Folder' from the 'Create In' drop-down menu and, voilà , a button for the feed appears on the toolbar. Now you can check for the latest news whenever you want.