Rated 5 out of 5 stars
This newsreader works perfectly, is easy to use, and is in the user's control. The database is kept in your filesystem wherever you want it, which makes it portable but completely in the users's control. This is the way RSS should work.
Note that Mozilla has flagged this as using legacy technology, which gives it access to all browser functions and data without requesting your permission. As the developer argues, it is safe to use because it is open source.
The addon's source code is publicly available, so that anybody could preform (or ask to) an independent review. You're much more exposed when installing certain operating systems and proprietary applications on your desktop or smartphone. Please, consider to review your judgement on this one, as for sure, even using legacy technology, NewsFox doesn't harm users in any way.