I made this free browser extension that modernizes the Hacker News design.
I previously launched Modern for Wikipedia [1] here back in December, and it seemed like the obvious next choice to build one for HN too! So I've taken what I learned from building that, and have spent all my spare time this year building Modern for HN.
I realize this won't be for everyone, but it was a fun project to work on, and I'm really happy with the result so far. Hope you like it too!
Lots more planned for future updates, and suggestions welcome :)