Rated 5 out of 5 stars

I really like this add-on, so much so, I'm now using it in preference to RSSOwl, which I've used for years.

That said, I'd really appreciate the ability to increase the font size in the news pane.

Also, as an aside, I'd also like the ability to remove the 'glow' property used to highlight the selected feed and instead change the feed name to a different colour

Currently using 2.1beta4 on Thunderbird/Arch Linux

This review is for a previous version of the add-on (2.0.3.1-signed). 

The new version 2.1 (beta at this time) allows to display larger or smaller fonts. (or you could use the Thunderbird zoom feature)

For specific style change you could use your personal style file: see userContent.css with @-moz-document url("about:bamboo") { ... }