wicknix,
From your site, I downloaded but couldn't install Sage. The info file said it couldn't find the archive file. And the Sage version listed at Little Linux Laptop is for a later version that won't work with Bon Echo (
http://www.littlelinuxlaptop.com/sage-a-bon-echo-firefox-add-on/ ).
From your info file, apparently, LLL users need Sage version sage-1.3.10-fx.xpi. It's available here:
http://ftp.mozilla.org/pub/mozilla.org/addons/77/and downloads and installs and works with Bon Echo. No offline reader, however, or at least I didn't find it capable of downloading feeds in the background for later, offline viewing. THAT would be nice.
Jake