Linux.com: infoRSS: An Unobtrusive RSS Feed Manager for Thunderbird and Firefox

“With so many RSS aggregators to choose from, you can pick the
one that fits your specific needs. If you don’t want to install
anything on your machine and you need to be able to access your
news feeds from anywhere, you can opt for a Web-based solution like
Netvibes. If you prefer a dedicated desktop RSS reader chock-full
of features, then something like RSSOwl or BlogBridge is the way to
go. But if you don’t want to get used to a whole new application,
you might want to give infoRSS a try. Unlike other RSS aggregators,
infoRSS is a Thunderbird/Firefox extension that runs inside your
email client or browser…”

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