Google Chrome version 54 was just released. If you already run Google Chrome your browser will automatically upgrade the next time you open the browser. New features include a rewrite of how YoutTube Flash videos play which improves performance and a security overhaul of how certain types of code is sandboxed.
You can read more about the changes at: https://googlechromereleases.blogspot.com/2016/10/stable-channel-update-for-desktop.html
and you can download Google Chrome from: https://www.google.com/chrome/