For example I've came to a webpage having the following tag inside its <head> tag:
<link rel="alternate" type="application/rss+xml" title="A blog feed" href="http://johndoe.github.com/atom.xml">
Or a blogger.com blog having both RSS and Atom feeds rels.
But my Firefox (7.0.1 on XUbuntu 11.10) doesn't indicate this! I have to view a page source code to see whether there is an RSS/Atom feed for it or not. Why? How to fix this?