Refresh number on the button when closing a feedly tab

[ThiefMaster]

If there are many new feeds I often read them on the site itself. Afterwards (when closing the tab or navigating away to a non-feedly site) it would be nice if the button refreshed itself automatically.

Of course if would be even nicer if it could check for the "mark as read" requests feedly sends while scrolling through the feeds and then decrease the number accordingly.