Rated 5 out of 5 stars

Thanks for this great addon.
It's very helpful.

I'd like to make these four suggestions:
1. Make the "Mark all as read" work not just for the selected feed but for ALL feeds instead.
2. Make the sorting by "Last updated" sort not only the items of each feed, but the feeds themselves too
4. Add highlighting of the current feed row as you hover the mouse cursor above them.
4. Doubleclicking is needless - change it so with a single-click one can expand a feed,
and with also a single-click to open it in a tab.

This review is for a previous version of the add-on (4.3.1).