Free and Open Source Software

I used to adore the Feedbro extension for Firefox - until I learned that browser extensions are a privacy concern and stopped using them. Unfortunately, I've been unable to find anything similar for the Linux desktop. I just can't seem to find the 'sweet spot' with all the readers I've tried. Some are bloated with features and complicated configurations that I will never use. Others are too simplistic. Still others haven't seen an update in years. I feel like this is an impossible quest.

The readers I have tried (and discarded):

• Liferea
• RSS Guard
• News Flash
• Feeds
• Feed Deck
• Feed Flow
• Akregator
• Thunderbird
• Raven Reader

Here are the features I need:

• FOSS (obviously)
• Import/export OPML
• Scale the size of the UI and all text elements
• RSS feed discovery
• Fetch full articles
• Configure update interval
• Privacy-conscious
• Desktop only (I am currently unable to self-host)

Things that would be nice, but I can live without if I have to:

• Dark mode
• An uncluttered, two-column display

That's about it. Now tell me that I am asking too much and there's no hope for me. :D