Launched in 2009 as an add-on for Firefox, Page Speed ??is a free code project from Google that helps developers to optimize web pages and improve their access speed.
In Chrome, Page Speed ??can be installed in this way: go to ?about: flags? (type in the address bar) and activate the option ?Experimental extension APIs?. After restarting the browser, it is necessary to install an additional add-on through from this link.
Google informs that over 1 million users currently use Page Speed.
Update: Google has also released a version of Page Speed ??that can be used directly by Google Labs, without the need for a supplement.