Simply adds the URL to the title bar.This put the URL of any web page you're on into the page title in the format:
Original Title |url:[http://www.the-url.com]
But why?
In Chrome, other applications used to be able to use Chrome_OmniboxView to get the URL of the page you are on. Since version 28, you can no longer do this.
However, you can still get the title of the window. This simple Chrome extension puts the URL into the title to make it available to other applications.