Blogs for Firefox has a post of interest for polibloggers:
One of the most interesting features of the Firefox browser is its support for extensions. Extensions are rapidly adding useful features to Firefox. An excellent example is Sage 1.3.
Sage is an extension that adds support for XML news feeds. The Firefox/Sage combination can really streamline your web browsing. Sage integrates the latest news feed headlines into a browser sidebar. This makes it easy to scan the news, and then click and view pages that you want to read.