Foxish is a Chrome/Chromium extension that adds Firefox like RSS/Atom live bookmarking.
It can be found in the [extension store](https://chrome.google.com/webstore/detail/foxish-live-rss/nbhdikhnaigcdlamenbgkmllgmfnngoi).
When it was first created it was novel because it did feed diffing to determine the minimum set of feed changes required to stay in sync. This was important because chrome limited bookmark operations to 100 per hour. These limits were removed in future years.
It auto detects feeds on a page using code borrowed form Googles own RSS extension.