Rated 5 out of 5 stars

feeds can be opened from Newfox page as new firefox tabs in the background - which makes Newsfox very usable with bookmarking and bookmarking firefox extensions. I have had no problem quickly updating a large amount of feeds as summaries.
Newsfox handles OPML files for exporting and importing wich makes it easy to set up other instances or other feed readers (i.e. liferea, quietrss, seamonkey, etc.)
Its easy to add feeds, delete feeds and to organize feeds into groups.

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