Curious why a browser extension and not a site like https://hckrnews.com/?
- It builds on the existing site, so the new design is always applied to HN urls. No need to visit a separate website.
- Privacy - everything is stored locally in your browser, there's no 3rd party website to track your activity etc. Also with JSON backup you're in full control of your data.
- Unlimited storage - local browser storage has limits, but extensions can request unlimited storage. This is useful for the history and bookmark features.