I LOVE the Active Bookmarks - this allows you to subscribe to pages with
rss feeds ie pages that let you know automaticlly when they've been updated. This
feature is ideal for keeping up to date with sites that change their content often
eg News sites, blogs and sporting results.
you visit a site, if it allows you to subscribe to its 'feed' a little orange
icon appears in the address bar. You simply click on it and add the site to your
active bookmarks. Then, each time you fire up the browser Firefox checks if the
site has been updated. So easy.