Rated 4 out of 5 stars

I was looking for an alternative to Brief, which stopped working properly after FF version 9 came along (it no longer opened articles in a new tab). Bamboo is actually very similar to Brief, and seemed to work properly. However, it does not permit scrolling through the feed list with page up/down or arrow keys. You can only scroll with the mouse. Having a chronic pain condition I have to keep my mouse use to a minimum, so that's a deal breaker for me. Give me keyboard scrolling and I'll be back!

This review is for a previous version of the add-on (1.2.1-signed). 

The new version includes keyboard shortcuts.
You can use left and right arrows to scroll in the list.

https://addons.mozilla.org/firefox/addon/bamboo-feed-reader/versions/