The extension will simply display an icon that allows you to access The Old Reader (http://theoldreader.com/) directly from your toolbar.
A badge will indicate the amount of unread messages that await your attention.
Optional notifications will alert you about new messages.
Packaged extension can be installed from the Chrome Web Store at https://chrome.google.com/webstore/detail/flnadglecinohkbmdpeooblldjpaimpo