Why can't NetNewsWire 3 subscribe to my feed?
NetNewsWire 3 may be unable to subscribe to your RSS feed (we strongly suggest upgraded to NNW4).
Reason
NNW3 uses the same trick as Firefox to detect if a URL is an RSS feed, and we use that trick to override the Firefox default RSS template. https://developer.mozilla.org/en/docs/XSL_Transformations_in_Mozilla_FAQ https://bugzilla.mozilla.org/show_bug.cgi?id=338621
Solution
If you want to ensure compatibility with this deprecated RSS news reader, disable the browser friendly template in your FeedPress settings (as illustrated below).
1. Go to Settings > Your Feed.
2. Find the "Feed template" section, uncheck the option, and save changes.